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Community Water System · PWS MT0004059

Sherwood Water Station

Columbus, Montana 59019 - drinking water served from groundwater sources to 25 people, tracked in EPA SDWIS and UCMR5.

25
People served
505
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 505 drinking-water violations at Sherwood Water Station, 1% of them health-based - above the Montana per-system average.

505
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
25
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sherwood Water Station

Sherwood Water Station is a private-owned community water system that delivers drinking water to 25 residents in Columbus, Montana (Stillwater County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 505 total violations for this system , of which 6 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 495 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 1,2,4-Trichlorobenzene, recorded in 21 violations (MR). 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%).

Sherwood Water Station's 505 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
25
Total Violations
505
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1
County
Stillwater
School/Daycare
No
MCL Violations
6
Monitoring Violations
495
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 21 2020
Xylenes, Total MR 21 2020
DICHLOROMETHANE MR 21 2020
o-Dichlorobenzene MR 21 2020
p-Dichlorobenzene MR 21 2020
1,1-Dichloroethylene MR 21 2020
1,2-Dichloroethane MR 21 2020
Carbon tetrachloride MR 21 2020
1,2-Dichloropropane MR 21 2020
Trichloroethylene MR 21 2020
CHLOROBENZENE MR 21 2020
Benzene MR 21 2020
Styrene MR 21 2020
Vinyl chloride MR 21 2020
trans-1,2-Dichloroethylene MR 21 2020
1,1,1-Trichloroethane MR 21 2020
Tetrachloroethylene MR 21 2020
Ethylbenzene MR 21 2020
cis-1,2-Dichloroethylene MR 21 2020
1,1,2-Trichloroethane MR 21 2020
Toluene MR 21 2020
Revised Total Coliform Rule MON 19 2023
Coliform (TCR) MR 17 2015
Nitrate-Nitrite MR 10 2017
Coliform (TCR) MCL 6 2006
Consumer Confidence Rule Other 4 2024
Gross Alpha, Excl. Radon and U MR 3 2008
Combined Radium (-226 and -228) MR 3 2008
Lead and Copper Rule 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 Sherwood Water Station.

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 MT0004059 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 Consumer Confidence Rule Other 4 SDWIS / MT0004059 / 7000
2023 Revised Total Coliform Rule MON 19 SDWIS / MT0004059 / 8000
2020 1,2,4-Trichlorobenzene MR 21 SDWIS / MT0004059 / 2378
2020 Xylenes, Total MR 21 SDWIS / MT0004059 / 2955
2020 DICHLOROMETHANE MR 21 SDWIS / MT0004059 / 2964
2020 o-Dichlorobenzene MR 21 SDWIS / MT0004059 / 2968
2020 p-Dichlorobenzene MR 21 SDWIS / MT0004059 / 2969
2020 1,1-Dichloroethylene MR 21 SDWIS / MT0004059 / 2977
2020 1,2-Dichloroethane MR 21 SDWIS / MT0004059 / 2980
2020 Carbon tetrachloride MR 21 SDWIS / MT0004059 / 2982
2020 1,2-Dichloropropane MR 21 SDWIS / MT0004059 / 2983
2020 Trichloroethylene MR 21 SDWIS / MT0004059 / 2984
2020 CHLOROBENZENE MR 21 SDWIS / MT0004059 / 2989
2020 Benzene MR 21 SDWIS / MT0004059 / 2990
2020 Styrene MR 21 SDWIS / MT0004059 / 2996

How Sherwood Water Station Compares

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

Metric Sherwood Water Station Montana avg Federal benchmark
Total violations 505 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 25 492 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 Sherwood Water Station water safe to drink? ▼
Sherwood Water Station (PWS ID: MT0004059) has 505 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 25 people using Groundwater sources.
How many people does Sherwood Water Station serve? ▼
Sherwood Water Station serves 25 people in Columbus, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Sherwood Water Station have? ▼
Sherwood Water Station has 505 total violations: 6 health-based violations (MCL exceedances or treatment failures), 495 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sherwood Water Station water? ▼
No PFAS testing data is available for Sherwood Water Station under the EPA's UCMR5 monitoring program.
What water source does Sherwood Water Station use? ▼
Sherwood Water Station 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.