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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 093200168

Nixon

Nixon, EPA Region 9 — Tribal Water Systems 89424 - drinking water served from groundwater sources to 800 people, tracked in EPA SDWIS and UCMR5.

800
People served
173
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 173 drinking-water violations at Nixon, 1% of them health-based.

173
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
800
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nixon

Nixon is a native american-owned community water system that delivers drinking water to 800 residents in Nixon, EPA Region 9 — Tribal Water Systems through 180 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 173 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 133 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 Chlorine, recorded in 13 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 9 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
800
Total Violations
173
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
180
School/Daycare
No
MCL Violations
0
Monitoring Violations
133
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 13 2025
Coliform (TCR) MR 9 2010
Nitrate MR 8 2021
Consumer Confidence Rule Other 7 2023
Revised Total Coliform Rule MON 6 2025
Public Notice Other 6 2024
Lead and Copper Rule MR 5 2020
Gross Alpha, Excl. Radon and U MR 4 2017
Total Haloacetic Acids (HAA5) MR 4 2023
TTHM MR 4 2023
BHC-GAMMA MR 2 2001
2,3,7,8-TCDD MR 2 2001
Pentachlorophenol MR 2 2001
Total Polychlorinated Biphenyls (PCB) MR 2 2001
Xylenes, Total MR 2 2014
DICHLOROMETHANE MR 2 2014
o-Dichlorobenzene MR 2 2014
p-Dichlorobenzene MR 2 2014
Vinyl chloride MR 2 2014
1,2-Dichloroethane MR 2 2014
1,1,1-Trichloroethane MR 2 2014
trans-1,2-Dichloroethylene MR 2 2014
Carbon tetrachloride MR 2 2014
1,2-Dichloropropane MR 2 2014
Trichloroethylene MR 2 2014
1,1,2-Trichloroethane MR 2 2014
Tetrachloroethylene MR 2 2014
CHLOROBENZENE MR 2 2014
Benzene MR 2 2014
Styrene MR 2 2014

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 Nixon.

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 093200168 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — Tribal Water Systems'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 09 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 Chlorine MR 13 SDWIS / 093200168 / 0999
2025 Revised Total Coliform Rule MON 6 SDWIS / 093200168 / 8000
2024 Public Notice Other 6 SDWIS / 093200168 / 7500
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / 093200168 / 5200
2023 Consumer Confidence Rule Other 7 SDWIS / 093200168 / 7000
2023 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 093200168 / 2456
2023 TTHM MR 4 SDWIS / 093200168 / 2950
2021 Nitrate MR 8 SDWIS / 093200168 / 1040
2021 Groundwater Rule TT 2 SDWIS / 093200168 / 0700
2020 Lead and Copper Rule MR 5 SDWIS / 093200168 / 5000
2017 Gross Alpha, Excl. Radon and U MR 4 SDWIS / 093200168 / 4000
2017 Combined Uranium MR 1 SDWIS / 093200168 / 4006
2017 Combined Radium (-226 and -228) MR 1 SDWIS / 093200168 / 4010
2014 Xylenes, Total MR 2 SDWIS / 093200168 / 2955
2014 DICHLOROMETHANE MR 2 SDWIS / 093200168 / 2964

How Nixon Compares

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

Metric Nixon EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 173 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 800 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 9 — Tribal Water Systems.

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 Nixon water safe to drink? ▼
Nixon (PWS ID: 093200168) has 173 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 800 people using Groundwater sources.
How many people does Nixon serve? ▼
Nixon serves 800 people in Nixon, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 180 service connections.
What type of violations does Nixon have? ▼
Nixon has 173 total violations: 2 health-based violations (MCL exceedances or treatment failures), 133 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Nixon water? ▼
No PFAS testing data is available for Nixon under the EPA's UCMR5 monitoring program.
What water source does Nixon use? ▼
Nixon uses Groundwater 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.