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Community Water System · PWS MT0000433

Spring Creek Colony Lewistown

Lewistown, Montana 59457 - drinking water served from groundwater sources to 48 people, tracked in EPA SDWIS and UCMR5.

48
People served
235
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 235 drinking-water violations at Spring Creek Colony Lewistown, 14% of them health-based - above the Montana per-system average.

235
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
48
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Spring Creek Colony Lewistown

Spring Creek Colony Lewistown is a private-owned community water system that delivers drinking water to 48 residents in Lewistown, Montana (Fergus County) through 12 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 235 total violations for this system , of which 33 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 197 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 33 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%).

Spring Creek Colony Lewistown's 235 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
48
Total Violations
235
Health-Based Violations
33
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
12
County
Fergus
School/Daycare
No
MCL Violations
33
Monitoring Violations
197
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 33 2006
Coliform (TCR) MR 13 2007
Cadmium MR 4 2005
Selenium MR 4 2005
Arsenic MR 4 2005
Chromium MR 4 2005
Fluoride MR 4 2005
Consumer Confidence Rule Other 4 2019
Barium MR 4 2005
Mercury MR 4 2005
Nickel MR 3 2005
Thallium, Total MR 3 2005
Di(2-ethylhexyl) adipate MR 3 2005
OXAMYL MR 3 2005
Picloram MR 3 2005
Dinoseb MR 3 2005
Hexachlorocyclopentadiene MR 3 2005
Carbofuran MR 3 2005
Aldicarb MR 3 2005
Atrazine MR 3 2005
Heptachlor MR 3 2005
2,4,5-TP MR 3 2005
HEXACHLOROBENZENE MR 3 2005
Benzo(a)pyrene MR 3 2005
Pentachlorophenol MR 3 2005
Chlordane MR 3 2005
1,2,4-Trichlorobenzene MR 3 2005
cis-1,2-Dichloroethylene MR 3 2005
DICHLOROMETHANE MR 3 2005
o-Dichlorobenzene MR 3 2005

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 Spring Creek Colony Lewistown.

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 MT0000433 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
2019 Consumer Confidence Rule Other 4 SDWIS / MT0000433 / 7000
2017 Lead and Copper Rule MR 2 SDWIS / MT0000433 / 5000
2007 Coliform (TCR) MR 13 SDWIS / MT0000433 / 3100
2006 Coliform (TCR) MCL 33 SDWIS / MT0000433 / 3100
2005 Cadmium MR 4 SDWIS / MT0000433 / 1015
2005 Selenium MR 4 SDWIS / MT0000433 / 1045
2005 Arsenic MR 4 SDWIS / MT0000433 / 1005
2005 Chromium MR 4 SDWIS / MT0000433 / 1020
2005 Fluoride MR 4 SDWIS / MT0000433 / 1025
2005 Barium MR 4 SDWIS / MT0000433 / 1010
2005 Mercury MR 4 SDWIS / MT0000433 / 1035
2005 Nickel MR 3 SDWIS / MT0000433 / 1036
2005 Thallium, Total MR 3 SDWIS / MT0000433 / 1085
2005 Di(2-ethylhexyl) adipate MR 3 SDWIS / MT0000433 / 2035
2005 OXAMYL MR 3 SDWIS / MT0000433 / 2036

How Spring Creek Colony Lewistown Compares

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

Metric Spring Creek Colony Lewistown Montana avg Federal benchmark
Total violations 235 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 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 48 492 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 Spring Creek Colony Lewistown water safe to drink? ▼
Spring Creek Colony Lewistown (PWS ID: MT0000433) has 235 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 48 people using Groundwater sources.
How many people does Spring Creek Colony Lewistown serve? ▼
Spring Creek Colony Lewistown serves 48 people in Lewistown, Montana. It is a Private-owned system using Groundwater water sources with 12 service connections.
What type of violations does Spring Creek Colony Lewistown have? ▼
Spring Creek Colony Lewistown has 235 total violations: 33 health-based violations (MCL exceedances or treatment failures), 197 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Spring Creek Colony Lewistown water? ▼
No PFAS testing data is available for Spring Creek Colony Lewistown under the EPA's UCMR5 monitoring program.
What water source does Spring Creek Colony Lewistown use? ▼
Spring Creek Colony Lewistown 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.