Public water system record

Osage Co RWD # 5

Serves an area of Osage County, OK that includes Barnsdall · 561 people served

Federal records show 98 health-based violations and 22 monitoring/reporting issues for Osage Co RWD # 5 in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

OK3005721
BARNSDALL
OK
561 served

System profile

Source water Purchased surface water

ZIP 74002

EPA system ID OK3005721

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 98
Resolved: 0
Unresolved: 1
Archived by EPA: 97
Any acute record: No
Monitoring issues, last 10 years: 22

Key facts

Osage Co RWD # 5 buys its water from Barnsdall.
Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.246 mg/L, federal limit 0.08 mg/L (3.1 times the limit), 2016.
Most recent formal enforcement: compliance order (no penalty) by EPA, March 2026.
Record on file since 1994, with 21 health-based violations before October 19, 2016.

Check whether Osage Co RWD # 5 serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.107 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.109 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	220	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.075 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.078 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Apr 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.104 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Apr 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	220	Apr 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Jan 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	220	Jan 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active Enforcement action in place	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Oct 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	220	Oct 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.096 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Jul 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Jul 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Apr 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Oct 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Jul 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Jul 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Apr 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Apr 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.122 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Jan 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Jan 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.123 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Oct 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Oct 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.121 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Jul 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Jul 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Apr 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.11 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	220	Apr 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Apr 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Jan 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.116 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Jan 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.114 mg/L, federal limit 0.06 mg/L (1.9 times the limit)	220	Jan 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.132 mg/L, federal limit 0.08 mg/L (1.7 times the limit)	220	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.112 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	220	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.087 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.119 mg/L, federal limit 0.06 mg/L (2 times the limit)	220	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	220	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.132 mg/L, federal limit 0.08 mg/L (1.7 times the limit)	220	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.123 mg/L, federal limit 0.06 mg/L (2.1 times the limit)	220	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.115 mg/L, federal limit 0.06 mg/L (1.9 times the limit)	220	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.103 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.157 mg/L, federal limit 0.08 mg/L (2 times the limit)	220	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.119 mg/L, federal limit 0.06 mg/L (2 times the limit)	220	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.116 mg/L, federal limit 0.06 mg/L (1.9 times the limit)	220	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.165 mg/L, federal limit 0.08 mg/L (2.1 times the limit)	220	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.129 mg/L, federal limit 0.08 mg/L (1.6 times the limit)	220	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.145 mg/L, federal limit 0.06 mg/L (2.4 times the limit)	220	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.113 mg/L, federal limit 0.06 mg/L (1.9 times the limit)	220	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.155 mg/L, federal limit 0.08 mg/L (1.9 times the limit)	220	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.125 mg/L, federal limit 0.08 mg/L (1.6 times the limit)	220	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.107 mg/L, federal limit 0.06 mg/L (1.8 times the limit)	220	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.15 mg/L, federal limit 0.06 mg/L (2.5 times the limit)	220	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.167 mg/L, federal limit 0.08 mg/L (2.1 times the limit)	220	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.134 mg/L, federal limit 0.08 mg/L (1.7 times the limit)	220	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.131 mg/L, federal limit 0.06 mg/L (2.2 times the limit)	220	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.167 mg/L, federal limit 0.06 mg/L (2.8 times the limit)	220	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.143 mg/L, federal limit 0.08 mg/L (1.8 times the limit)	220	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.156 mg/L, federal limit 0.08 mg/L (2 times the limit)	220	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.13 mg/L, federal limit 0.06 mg/L (2.2 times the limit)	220	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.149 mg/L, federal limit 0.06 mg/L (2.5 times the limit)	220	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.13 mg/L, federal limit 0.08 mg/L (1.6 times the limit)	220	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.151 mg/L, federal limit 0.08 mg/L (1.9 times the limit)	220	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.118 mg/L, federal limit 0.06 mg/L (2 times the limit)	220	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.124 mg/L, federal limit 0.06 mg/L (2.1 times the limit)	220	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.117 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.141 mg/L, federal limit 0.08 mg/L (1.8 times the limit)	220	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.085 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.088 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.104 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Jul 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.133 mg/L, federal limit 0.08 mg/L (1.7 times the limit)	220	Jul 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Apr 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Apr 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Apr 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)	220	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)	220	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.101 mg/L, federal limit 0.06 mg/L (1.7 times the limit)	220	Oct 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.126 mg/L, federal limit 0.08 mg/L (1.6 times the limit)	220	Jul 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.083 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Jul 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Apr 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.141 mg/L, federal limit 0.08 mg/L (1.8 times the limit)	220	Apr 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jan 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.161 mg/L, federal limit 0.08 mg/L (2 times the limit)	220	Jan 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.189 mg/L, federal limit 0.08 mg/L (2.4 times the limit)	220	Oct 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.097 mg/L, federal limit 0.06 mg/L (1.6 times the limit)	220	Oct 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.157 mg/L, federal limit 0.08 mg/L (2 times the limit)	220	Jul 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Jul 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.183 mg/L, federal limit 0.08 mg/L (2.3 times the limit)	220	Apr 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)	220	Apr 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.158 mg/L, federal limit 0.08 mg/L (2 times the limit)	220	Jan 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	220	Jan 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.096 mg/L, federal limit 0.06 mg/L (1.6 times the limit)	220	Oct 1, 2016	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.246 mg/L, federal limit 0.08 mg/L (3.1 times the limit)	220	Oct 1, 2016	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
Total Trihalomethanes (TTHMs) Monitoring and reporting	Apr 1, 2025	Active
Haloacetic Acids (HAA5) Monitoring and reporting	Apr 1, 2025	Active
Haloacetic Acids (HAA5) Monitoring and reporting	Dec 30, 2024	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Dec 30, 2024	Resolved
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active Enforcement action in place
Haloacetic Acids (HAA5) Monitoring and reporting	Oct 1, 2024	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Oct 1, 2024	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Sep 29, 2024	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Jul 1, 2024	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Jul 1, 2024	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Feb 1, 2024	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Feb 1, 2024	Resolved
Revised Total Coliform Rule Monitoring violation	Feb 1, 2024	Resolved
Chlorine Monitoring and reporting	Jan 1, 2024	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Nov 1, 2023	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Nov 1, 2023	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Aug 1, 2023	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Aug 1, 2023	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	May 1, 2023	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	May 1, 2023	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Nov 1, 2020	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Nov 1, 2020	Resolved

Full record since 1994

EPA's records for Osage Co RWD # 5 go back to 1994. Before October 19, 2016 they list 21 health-based violations (2 resolved, 19 archived by EPA without a recorded fix) and 7 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	0	2
2000s	2	1
2010 to October 18, 2016	19	4
October 19, 2016 to 2019	28	0
2020s	68	22

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began October 2016, Archived.

Show all 21 health-based violations before October 19, 2016

Contaminant	Start date	Status
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.096 mg/L, federal limit 0.06 mg/L (1.6 times the limit)	Oct 1, 2016	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.246 mg/L, federal limit 0.08 mg/L (3.1 times the limit)	Oct 1, 2016	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.118 mg/L, federal limit 0.06 mg/L (2 times the limit)	Jul 1, 2016	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.213 mg/L, federal limit 0.08 mg/L (2.7 times the limit)	Jul 1, 2016	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.22 mg/L, federal limit 0.08 mg/L (2.8 times the limit)	Apr 1, 2016	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.147 mg/L, federal limit 0.06 mg/L (2.5 times the limit)	Apr 1, 2016	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.203 mg/L, federal limit 0.08 mg/L (2.5 times the limit)	Jan 1, 2016	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	Jan 1, 2016	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.172 mg/L, federal limit 0.08 mg/L (2.2 times the limit)	Oct 1, 2015	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.135 mg/L, federal limit 0.06 mg/L (2.3 times the limit)	Oct 1, 2015	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.154 mg/L, federal limit 0.08 mg/L (1.9 times the limit)	Jul 1, 2015	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.127 mg/L, federal limit 0.06 mg/L (2.1 times the limit)	Jul 1, 2015	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.096 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	Apr 1, 2015	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	Apr 1, 2015	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	Jan 1, 2015	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.121 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	Jan 1, 2015	Archived
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	Oct 1, 2014	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.11 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	Oct 1, 2014	Archived
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.147 mg/L, federal limit 0.08 mg/L (1.8 times the limit)	Jul 1, 2014	Archived
Total Coliform Contaminant limit exceeded	Nov 1, 2008	Resolved
Total Coliform Contaminant limit exceeded	Jan 1, 2005	Resolved

Enforcement actions

Oklahoma regulators and EPA took 10 formal enforcement actions against Osage Co RWD # 5 between 2014 and 2026. The most recent was a compliance order (no penalty) in March 2026.

Date	By	Action	Violations covered
Mar 31, 2026	EPA	Compliance order (no penalty)	2 violations (1 health-based): LEAD AND COPPER RULE REVISIONS
Nov 18, 2025	Oklahoma	Compliance order (no penalty)	8 violations (8 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Dec 13, 2021	Oklahoma	Compliance order with a penalty	103 violations (103 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Jun 29, 2016	Oklahoma	Compliance order with a penalty	79 violations (79 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Dec 31, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Oct 14, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Aug 21, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Apr 22, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jan 12, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Sep 18, 2014	Oklahoma	Compliance order with a penalty	1 violation (1 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

57 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

40 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Osage Co RWD # 5 buys its water from Barnsdall. It lists no wells or intakes of its own.

Buys water from

Barnsdall Barnsdall, OK

Annual water quality report

Osage Co RWD # 5 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Oklahoma.

Certified drinking water labs by state EPA guidance for private wells