Public water system · OK2002633
ActiveGrady Co Rwd #7 (Ninnekah)
At a glance
Grady Co Rwd #7 (Ninnekah) (PWSID OK2002633) is an active community water system in Grady County, Oklahoma. It reports serving 2,425 people through 1,225 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,425
Service connections
1,225
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grady Co Rwd #7 (Ninnekah) compare with other water systems in Grady County?
By EPA's size categories, Grady Co Rwd #7 (Ninnekah) is a small system (501 to 3,300 people). Grady County has 29 active public water systems, and Grady Co Rwd #7 (Ninnekah) is the 3rd-largest of them by population served. Its population served is about 132% above the county average of 1,045 people per system, and accounts for 8% of the 30,294 people reported by systems filed under the county. Across Oklahoma, the 1,254 active systems average 2,907 people each. Nationally, the average active community water system reports serving 6,703 people, so Grady Co Rwd #7 (Ninnekah) is about 64% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Oklahoma has 864 active community water systems, 69% of the state's 1,254 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 701 Oklahoma systems (56%) list groundwater as their primary source.
Who owns and regulates Grady Co Rwd #7 (Ninnekah)?
EPA lists Grady Co Rwd #7 (Ninnekah) as owned by a local government. The OK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 11 of the 29 active systems in Grady County (38%) are also owned by a local government.
Does Grady Co Rwd #7 (Ninnekah) have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. The violations listed here began between April 2009 and October 2024. By type: 7 monitoring and reporting, 2 contaminant level above the legal limit, 1 reporting, 1 required treatment not met and 1 monitoring. The contaminant or rule involved most often is Arsenic (3 of them). EPA lists 11 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2024-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross Beta Particle Activitycode 4100 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2009-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Grady Co Rwd #7 (Ninnekah): frequently asked questions
Who runs Grady Co Rwd #7 (Ninnekah)?
Grady Co Rwd #7 (Ninnekah) (PWSID OK2002633) is a community water system owned by a local government. It is regulated by the OK state drinking water program.
How many people does Grady Co Rwd #7 (Ninnekah) serve?
Grady Co Rwd #7 (Ninnekah) reports serving 2,425 people through 1,225 service connections in Grady County, Oklahoma.
Where does Grady Co Rwd #7 (Ninnekah) get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Grady Co Rwd #7 (Ninnekah) have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Grady Co Rwd #7 (Ninnekah)'s water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Grady Co Rwd #7 (Ninnekah)'s water quality report?
As a community water system, Grady Co Rwd #7 (Ninnekah) must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Grady County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Chickasha Municipal Authority | Grady | 16,036 | Community | Surface water |
| Grady Co Rwd #6 | Grady | 3,930 | Community | Groundwater |
| Minco | Grady | 1,632 | Community | Groundwater |
| Rush Springs | Grady | 1,278 | Community | Groundwater |
| Norge Water and Sewer Co., Inc. | Grady | 890 | Community | Purchased surface water |
| Bridge Creek School | Grady | 800 | Non-transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Grady Co Rwd #7 (Ninnekah), PWSID OK2002633, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/grady-co-rwd-7-ninnekah-ok2002633 (data as of October 1, 2026).