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Non-Transient Non-Community Water System · PWS MT0000771

Centerville School

Sand Coulee, Montana 59472 - drinking water served from groundwater sources to 292 people, tracked in EPA SDWIS and UCMR5.

292
People served
140
EPA violations
53
Health-based
Untested
UCMR5 result

The verdict

EPA records 140 drinking-water violations at Centerville School, 38% of them health-based - above the Montana per-system average.

140
Total EPA violations on record
38%
Health-based (MCL / treatment failure)
292
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Centerville School

Centerville School is a state-owned non-transient non-community water system that delivers drinking water to 292 residents in Sand Coulee, Montana (Cascade County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 140 total violations for this system , of which 53 (38%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 87 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 34 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 Montana, EPA tracks 2,263 public water systems serving 1,112,267 people, with 297,270 cumulative violations and 25,922 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 131.4 violations. Statewide, 28 of 45 UCMR5-tested systems have reported PFAS detections (62.2%).

Centerville School's 140 violations sit above the Montana 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
292
Total Violations
140
Health-Based Violations
53
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
State
Connections
1
County
Cascade
School/Daycare
Yes
MCL Violations
34
Monitoring Violations
87
Treatment Tech Violations
19

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 34 2008
Groundwater Rule MR 22 2022
Groundwater Rule TT 19 2023
Lead and Copper Rule MR 14 2024
Coliform (TCR) MR 8 1994
Nitrate-Nitrite MR 6 2014
Revised Total Coliform Rule MON 4 2017
Barium MR 3 2002
Chromium MR 3 2002
Fluoride MR 3 2002
Mercury MR 3 2002
Nickel MR 3 2002
Antimony, Total MR 3 2002
Selenium MR 3 2002
Chlorine MR 3 2012
Cadmium MR 3 2002
Thallium, Total MR 3 2002
Beryllium, Total MR 3 2002

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 Centerville School.

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 MT0000771 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Montana Drinking Water Authority

Montana'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 MT 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
2024 Lead and Copper Rule MR 14 SDWIS / MT0000771 / 5000
2023 Groundwater Rule TT 19 SDWIS / MT0000771 / 0700
2022 Groundwater Rule MR 22 SDWIS / MT0000771 / 0700
2017 Revised Total Coliform Rule MON 4 SDWIS / MT0000771 / 8000
2014 Nitrate-Nitrite MR 6 SDWIS / MT0000771 / 1038
2012 Chlorine MR 3 SDWIS / MT0000771 / 0999
2008 Coliform (TCR) MCL 34 SDWIS / MT0000771 / 3100
2002 Barium MR 3 SDWIS / MT0000771 / 1010
2002 Chromium MR 3 SDWIS / MT0000771 / 1020
2002 Fluoride MR 3 SDWIS / MT0000771 / 1025
2002 Mercury MR 3 SDWIS / MT0000771 / 1035
2002 Nickel MR 3 SDWIS / MT0000771 / 1036
2002 Antimony, Total MR 3 SDWIS / MT0000771 / 1074
2002 Selenium MR 3 SDWIS / MT0000771 / 1045
2002 Cadmium MR 3 SDWIS / MT0000771 / 1015

How Centerville School Compares

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

Metric Centerville School Montana avg Federal benchmark
Total violations 140 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 53 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 62.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 292 492 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,263 regulated public water systems in Montana.

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 Centerville School water safe to drink? ▼
Centerville School (PWS ID: MT0000771) has 140 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 292 people using Groundwater sources.
How many people does Centerville School serve? ▼
Centerville School serves 292 people in Sand Coulee, Montana. It is a State-owned system using Groundwater water sources with 1 service connections.
What type of violations does Centerville School have? ▼
Centerville School has 140 total violations: 53 health-based violations (MCL exceedances or treatment failures), 87 monitoring/reporting violations, and 19 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Centerville School water? ▼
No PFAS testing data is available for Centerville School under the EPA's UCMR5 monitoring program.
What water source does Centerville School use? ▼
Centerville School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.