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Community Water System · PWS OK3005303

Nowata Co RWD #2

Nowata, Oklahoma 74048 - drinking water served from surface water sources to 205 people, tracked in EPA SDWIS and UCMR5.

205
People served
244
EPA violations
114
Health-based
Untested
UCMR5 result

The verdict

EPA records 244 drinking-water violations at Nowata Co RWD #2, 47% of them health-based - below the Oklahoma per-system average.

244
Total EPA violations on record
47%
Health-based (MCL / treatment failure)
205
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nowata Co RWD #2

Nowata Co RWD #2 is a local-owned community water system that delivers drinking water to 205 residents in Nowata, Oklahoma (Nowata County) through 82 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 244 total violations for this system , of which 114 (47%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 88 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is TTHM, recorded in 86 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Oklahoma, EPA tracks 1,262 public water systems serving 3,699,452 people, with 336,706 cumulative violations and 113,804 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 266.8 violations. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%).

Nowata Co RWD #2's 244 violations sit below the Oklahoma average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
205
Total Violations
244
Health-Based Violations
114
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
82
County
Nowata
School/Daycare
No
MCL Violations
114
Monitoring Violations
88
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 86 2025
Lead and Copper Rule MR 42 2025
TTHM MR 34 2025
Total Haloacetic Acids (HAA5) MCL 26 2020
Consumer Confidence Rule Other 15 2025
Public Notice Other 11 2025
Total Haloacetic Acids (HAA5) MR 8 2020
Coliform (TCR) MR 4 1999
Coliform (TCR) MCL 2 1992

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Nowata Co RWD #2.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID OK3005303 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oklahoma Drinking Water Authority

Oklahoma's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find OK regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 TTHM MCL 86 SDWIS / OK3005303 / 2950
2025 Lead and Copper Rule MR 42 SDWIS / OK3005303 / 5000
2025 TTHM MR 34 SDWIS / OK3005303 / 2950
2025 Consumer Confidence Rule Other 15 SDWIS / OK3005303 / 7000
2025 Public Notice Other 11 SDWIS / OK3005303 / 7500
2020 Total Haloacetic Acids (HAA5) MCL 26 SDWIS / OK3005303 / 2456
2020 Total Haloacetic Acids (HAA5) MR 8 SDWIS / OK3005303 / 2456
1999 Coliform (TCR) MR 4 SDWIS / OK3005303 / 3100
1992 Coliform (TCR) MCL 2 SDWIS / OK3005303 / 3100

How Nowata Co RWD #2 Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Nowata Co RWD #2 Oklahoma avg Federal benchmark
Total violations 244 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 114 90.2 Indicates a contaminant exceeded a federal MCL
PFAS detection None 60.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 205 2,931 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,262 regulated public water systems in Oklahoma.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Nowata Co RWD #2 water safe to drink? ▼
Nowata Co RWD #2 (PWS ID: OK3005303) has 244 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 205 people using Surface Water sources.
How many people does Nowata Co RWD #2 serve? ▼
Nowata Co RWD #2 serves 205 people in Nowata, Oklahoma. It is a Local-owned system using Surface Water water sources with 82 service connections.
What type of violations does Nowata Co RWD #2 have? ▼
Nowata Co RWD #2 has 244 total violations: 114 health-based violations (MCL exceedances or treatment failures), 88 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Nowata Co RWD #2 water? ▼
No PFAS testing data is available for Nowata Co RWD #2 under the EPA's UCMR5 monitoring program.
What water source does Nowata Co RWD #2 use? ▼
Nowata Co RWD #2 uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.