PlainWater
States → Montana

Community Water System · PWS MT0000594

Phoenix Park

East Helena, Montana 59635 - drinking water served from groundwater sources to 36 people, tracked in EPA SDWIS and UCMR5.

36
People served
891
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 891 drinking-water violations at Phoenix Park, 1% of them health-based - above the Montana per-system average.

891
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
36
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Phoenix Park

Phoenix Park is a private-owned community water system that delivers drinking water to 36 residents in East Helena, Montana (Lewis and Clark County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 891 total violations for this system , of which 7 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 859 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 87 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, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Phoenix Park's 891 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
36
Total Violations
891
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
14
County
Lewis and Clark
School/Daycare
No
MCL Violations
5
Monitoring Violations
859
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 87 2015
Revised Total Coliform Rule MON 31 2024
Consumer Confidence Rule Other 22 2018
Arsenic MR 20 2014
Lead and Copper Rule MR 19 2024
Nitrate-Nitrite MR 15 2017
Endrin MR 13 2014
OXAMYL MR 13 2014
Simazine MR 13 2014
Di(2-ethylhexyl) phthalate MR 13 2014
Picloram MR 13 2014
Dinoseb MR 13 2014
Atrazine MR 13 2014
LASSO MR 13 2014
2,4-D MR 13 2014
Pentachlorophenol MR 13 2014
1,2,4-Trichlorobenzene MR 13 2014
cis-1,2-Dichloroethylene MR 13 2014
DICHLOROMETHANE MR 13 2014
o-Dichlorobenzene MR 13 2014
p-Dichlorobenzene MR 13 2014
1,1-Dichloroethylene MR 13 2014
1,2-Dichloropropane MR 13 2014
Trichloroethylene MR 13 2014
1,1,2-Trichloroethane MR 13 2014
Tetrachloroethylene MR 13 2014
CHLOROBENZENE MR 13 2014
Benzene MR 13 2014
Ethylbenzene MR 13 2014
Xylenes, Total MR 13 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 Phoenix Park.

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 MT0000594 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 Revised Total Coliform Rule MON 31 SDWIS / MT0000594 / 8000
2024 Lead and Copper Rule MR 19 SDWIS / MT0000594 / 5000
2018 Consumer Confidence Rule Other 22 SDWIS / MT0000594 / 7000
2017 Nitrate-Nitrite MR 15 SDWIS / MT0000594 / 1038
2015 Coliform (TCR) MR 87 SDWIS / MT0000594 / 3100
2014 Arsenic MR 20 SDWIS / MT0000594 / 1005
2014 Endrin MR 13 SDWIS / MT0000594 / 2005
2014 OXAMYL MR 13 SDWIS / MT0000594 / 2036
2014 Simazine MR 13 SDWIS / MT0000594 / 2037
2014 Di(2-ethylhexyl) phthalate MR 13 SDWIS / MT0000594 / 2039
2014 Picloram MR 13 SDWIS / MT0000594 / 2040
2014 Dinoseb MR 13 SDWIS / MT0000594 / 2041
2014 Atrazine MR 13 SDWIS / MT0000594 / 2050
2014 LASSO MR 13 SDWIS / MT0000594 / 2051
2014 2,4-D MR 13 SDWIS / MT0000594 / 2105

How Phoenix Park Compares

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

Metric Phoenix Park Montana avg Federal benchmark
Total violations 891 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 11.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 36 492 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 Phoenix Park water safe to drink? ▼
Phoenix Park (PWS ID: MT0000594) has 891 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 36 people using Groundwater sources.
How many people does Phoenix Park serve? ▼
Phoenix Park serves 36 people in East Helena, Montana. It is a Private-owned system using Groundwater water sources with 14 service connections.
What type of violations does Phoenix Park have? ▼
Phoenix Park has 891 total violations: 7 health-based violations (MCL exceedances or treatment failures), 859 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Phoenix Park water? ▼
No PFAS testing data is available for Phoenix Park under the EPA's UCMR5 monitoring program.
What water source does Phoenix Park use? ▼
Phoenix Park 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.