Public water system record
Delaware Co RWD # 3
Serves an area of Delaware County, OK that includes Zena and Dennis · 653 people served
Federal records show 12 health-based violations and no monitoring/reporting issues for Delaware Co RWD # 3 in the last ten years. The most serious issue in this window was a resolved CARBON, TOTAL violation.
System profile
Source water
Surface water
ZIP
74346
EPA system ID
OK1221615
- Health-based violations, last 10 years
- 12
- Resolved
- 12
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Delaware Co RWD # 3 draws water from 1 surface water intake.
- Most recent formal enforcement: compliance order (no penalty) by Oklahoma, March 2025.
- Record on file since 1991, with 64 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 873 service lines.
Check whether Delaware Co RWD # 3 serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2024 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2023 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2023 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2023 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2022 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jul 1, 2021 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Jan 1, 2021 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Oct 1, 2017 | Resolved | No |
|
CARBON, TOTAL
Treatment technique failure
|
210 | Apr 1, 2017 | Resolved | No |
Full record since 1991
EPA's records for Delaware Co RWD # 3 go back to 1991. Before October 19, 2016 they list 64 health-based violations (64 resolved) and 11 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 5 |
| 2000s | 44 | 6 |
| 2010 to October 18, 2016 | 20 | 0 |
| October 19, 2016 to 2019 | 2 | 0 |
| 2020s | 10 | 0 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began April 2016, Resolved.
Show all 64 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Jan 1, 2016 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2016 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Oct 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jul 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Apr 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Oct 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jul 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jan 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2010 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jul 1, 2010 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2010 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.103 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jan 1, 2010 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Oct 1, 2009 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.11 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Oct 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.065 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2009 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jul 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2009 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.096 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2009 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2009 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2009 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2008 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2008 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2008 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jan 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2006 | Resolved |
14 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Oklahoma regulators took 29 formal enforcement actions against Delaware Co RWD # 3 and issued 1 boil water order between 1991 and 2025. The most recent was a compliance order (no penalty) in March 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 7, 2025 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Oct 31, 2024 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Jul 31, 2024 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| May 3, 2024 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Nov 15, 2023 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Aug 2, 2023 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| May 30, 2023 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Mar 2, 2023 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Jan 6, 2022 | Oklahoma | Compliance order (no penalty) | 2 violations (2 health-based): CARBON, TOTAL |
| Jul 14, 2017 | Oklahoma | Compliance order with a penalty | 17 violations (17 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Mar 11, 2016 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), CARBON, TOTAL |
| Dec 4, 2015 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), CARBON, TOTAL |
| Sep 11, 2015 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), CARBON, TOTAL |
| Jun 11, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Mar 13, 2015 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs) |
| Nov 12, 2014 | Oklahoma | Compliance order with a penalty | 3 violations (3 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Feb 19, 2008 | Oklahoma | Compliance order (no penalty) | 48 violations (45 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Chlorine |
| Dec 3, 2007 | Oklahoma | Compliance order with a penalty | 4 violations (4 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL |
| May 30, 2007 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL |
| Feb 15, 2007 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs) |
| Nov 9, 2006 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL |
| Oct 5, 2006 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs) |
| Sep 13, 2006 | Oklahoma | Compliance order with a penalty | 3 violations (3 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), CARBON, TOTAL |
| Jun 21, 2006 | Oklahoma | Compliance order (no penalty) | 51 violations (48 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Chlorine |
| Apr 10, 2006 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| Jan 10, 2006 | Oklahoma | Compliance order with a penalty | 1 violation: Chlorine |
| Dec 29, 2005 | Oklahoma | Compliance order with a penalty | 4 violations (4 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Jun 24, 2005 | Oklahoma | Compliance order with a penalty | 8 violations (5 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Sep 24, 1991 | Oklahoma | Boil water order | 1 violation |
| Jul 18, 1991 | Oklahoma | Compliance order with a penalty | 1 violation: Total Coliform |
What the violations mean
CARBON, TOTAL
12 incidentsThe system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Delaware Co RWD # 3 draws water from 1 surface water intake.
Annual water quality report
Delaware Co RWD # 3 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