Public water system record
Nichols Hills
Serves Oklahoma City and Nichols Hills, Oklahoma County, OK · 4,020 people served
Federal records show 1 health-based violation and 69 monitoring/reporting issues for Nichols Hills in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 69
Key facts
- Nichols Hills draws water from 23 wells (1 of them for emergency, seasonal or other part-time use).
- Most recent formal enforcement: compliance order with a penalty by Oklahoma, July 2016.
- Record on file since 1979, with 20 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 66 unknown out of 1,924 service lines.
Check whether Nichols Hills 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
LASSO
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Picloram
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Simazine
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Endothall
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Diquat
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Dalapon
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Endrin
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2023 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
LASSO
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Picloram
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Simazine
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Endothall
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Diquat
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Dalapon
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Endrin
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
E. coli
Monitoring and reporting
|
Jun 21, 2017 | Resolved |
Full record since 1979
EPA's records for Nichols Hills go back to 1979. Before October 19, 2016 they list 20 health-based violations (19 resolved, 1 archived by EPA without a recorded fix) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 2 | 0 |
| 1990s | 8 | 2 |
| 2000s | 8 | 2 |
| 2010 to October 18, 2016 | 2 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 68 |
Most recent health-based violation before October 19, 2016: Arsenic, began April 2016, Resolved.
Show all 20 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 40 µg/L, federal limit 30 µg/L (1.3 times the limit)
|
Jul 1, 2005 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 36 µg/L, federal limit 30 µg/L (1.2 times the limit)
|
Oct 1, 2004 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 89 µg/L, federal limit 30 µg/L (3 times the limit)
|
Oct 1, 2004 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 51 pCi/L, federal limit 15 pCi/L (3.4 times the limit)
|
Oct 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2003 | Resolved |
|
Selenium
Contaminant limit exceeded
|
Jan 1, 2000 | Resolved |
|
Selenium
Contaminant limit exceeded
|
Oct 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1997 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1992 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1991 | Resolved |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Jul 1, 1990 | Resolved |
|
Selenium
Contaminant limit exceeded
|
May 25, 1979 | Archived |
|
Selenium
Contaminant limit exceeded
|
May 25, 1979 | Resolved |
Enforcement actions
Oklahoma regulators took 4 formal enforcement actions against Nichols Hills between 1995 and 2016. The most recent was a compliance order with a penalty in July 2016.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 20, 2016 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Arsenic |
| Jun 7, 2010 | Oklahoma | Compliance order with a penalty | 4 violations (4 health-based): Combined Uranium, Gross Alpha, Excl. Radon and U |
| May 13, 2010 | Oklahoma | Compliance order with a penalty | 1 violation: Arsenic |
| Oct 19, 1995 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
What the violations mean
LEAD AND COPPER RULE REVISIONS
1 incidentThe 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
Nichols Hills draws water from 23 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Nichols Hills 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