NICHOLS HILLS
PWSID: OK2005501 · Nichols Hills, OK · Serves 4,020 people
According to EPA Safe Drinking Water Information System (SDWIS), NICHOLS HILLS (PWSID OK2005501) in Nichols Hills, OK is listed as a CWS water system covering about 4,020 people. The same extract lists 13 health-based violation records spanning 1979-2024. Those 13 health-based rows for NICHOLS HILLS cover contaminants such as Coliform (TCR), Arsenic, Coliform (Pre-TCR); they remain historical EPA registry entries, not a current compliance or drinkability score.
NICHOLS HILLS has 13 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 6 distinct EPA contaminant codes appear in this system's record, including Coliform (TCR), Arsenic, Coliform (Pre-TCR). Recorded violations span 1979–2024. Day-to-day primacy enforcement for this system runs through the Oklahoma drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Oklahoma state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- OK2005501
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Nichols Hills, OK
- Population Served
- 4,020
- Health Violations
- Yes (13)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Coliform (TCR) | 6 | 6 |
| Arsenic | 2 | 2 |
| Coliform (Pre-TCR) | 2 | 2 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
| Gross Alpha, Excl. Radon and U | 1 | 1 |
| Selenium | 1 | 1 |
Violation History (13)
| Contaminant | Health | Date |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| Arsenic | Yes | Apr 1, 2016 |
| Arsenic | Yes | Jan 1, 2016 |
| Coliform (TCR) | Yes | Aug 1, 1997 |
| Coliform (TCR) | Yes | Sep 1, 1995 |
| Coliform (TCR) | Yes | Oct 1, 1994 |
| Coliform (TCR) | Yes | Jan 1, 1993 |
| Coliform (TCR) | Yes | Aug 1, 1992 |
| Coliform (TCR) | Yes | Nov 1, 1991 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 1990 |
| Coliform (Pre-TCR) | Yes | Oct 1, 1988 |
| Coliform (Pre-TCR) | Yes | Jan 1, 1987 |
| Selenium | Yes | May 25, 1979 |
Frequently Asked Questions
What does EPA SDWIS list for NICHOLS HILLS?
How many people does NICHOLS HILLS serve?
What violations does NICHOLS HILLS have?
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Compare beyond Oklahoma
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest NICHOLS HILLS on cumulative violation count (13) and EPA-reported population served (4,020). Violation-count peers include SCUA Lower Peridot, Cocopah Bend RV & Golf Resort, BETHEL HEIGHTS WATER SYSTEM. Population peers include COLCHESTER SEWER & WATER COMMISSION, FORT BRANCH WATER DEPARTMENT, NORTH OF CROWLEY WATER CORPORATION.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
NICHOLS HILLS (OK2005501) is drawn from EPA SDWIS. Nearby county systems in this extract include OKLAHOMA CITY; MIDWEST CITY; DEL CITY; BETHANY. Health-based rows (13 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.