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States → EPA Region 8 — Tribal Water Systems

Community Water System · PWS 083090008

Seville Water System

Browning, EPA Region 8 — Tribal Water Systems 59417 - drinking water served from surface water sources to 300 people, tracked in EPA SDWIS and UCMR5.

300
People served
32
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 32 drinking-water violations at Seville Water System, 13% of them health-based.

32
Total EPA violations on record
13%
Health-based (MCL / treatment failure)
300
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Seville Water System

Seville Water System is a native american-owned community water system that delivers drinking water to 300 residents in Browning, EPA Region 8 — Tribal Water Systems through 52 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 32 total violations for this system , of which 4 (13%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 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 Coliform (TCR), recorded in 5 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 8 — 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
300
Total Violations
32
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
52
School/Daycare
No
MCL Violations
0
Monitoring Violations
24
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 5 2014
Lead and Copper Rule MR 4 2023
Consumer Confidence Rule Other 4 2023
TTHM MR 4 2022
Total Haloacetic Acids (HAA5) MR 4 2022
Revised Total Coliform Rule MON 4 2024
Long Term 2 Enhanced Surface Water Treatment Rule TT 4 2018
Surface Water Treatment Rule MR 3 2025

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 Seville Water System.

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 083090008 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 8 — Tribal Water Systems Drinking Water Authority

EPA Region 8 — 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 08 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 Surface Water Treatment Rule MR 3 SDWIS / 083090008 / 0200
2024 Revised Total Coliform Rule MON 4 SDWIS / 083090008 / 8000
2023 Lead and Copper Rule MR 4 SDWIS / 083090008 / 5000
2023 Consumer Confidence Rule Other 4 SDWIS / 083090008 / 7000
2022 TTHM MR 4 SDWIS / 083090008 / 2950
2022 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 083090008 / 2456
2018 Long Term 2 Enhanced Surface Water Treatment Rule TT 4 SDWIS / 083090008 / 0800
2014 Coliform (TCR) MR 5 SDWIS / 083090008 / 3100

How Seville Water System Compares

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

Metric Seville Water System EPA Region 8 — Tribal Water Systems avg Federal benchmark
Total violations 32 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 300 - 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 8 — 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 Seville Water System water safe to drink? ▼
Seville Water System (PWS ID: 083090008) has 32 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Surface Water sources.
How many people does Seville Water System serve? ▼
Seville Water System serves 300 people in Browning, EPA Region 8 — Tribal Water Systems. It is a Native American-owned system using Surface Water water sources with 52 service connections.
What type of violations does Seville Water System have? ▼
Seville Water System has 32 total violations: 4 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Seville Water System water? ▼
No PFAS testing data is available for Seville Water System under the EPA's UCMR5 monitoring program.
What water source does Seville Water System use? ▼
Seville Water System 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.