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Community Water System · PWS MT0000050

Park Garden Estates

Great Falls, Montana 59404 - drinking water served from groundwater sources to 50 people, tracked in EPA SDWIS and UCMR5.

50
People served
286
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 286 drinking-water violations at Park Garden Estates - above the Montana per-system average.

286
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
50
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Park Garden Estates

Park Garden Estates is a private-owned community water system that delivers drinking water to 50 residents in Great Falls, Montana (Cascade County) through 16 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 286 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 280 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 Gross Alpha, Excl. Radon and U, 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, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Park Garden Estates's 286 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
50
Total Violations
286
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
16
County
Cascade
School/Daycare
No
MCL Violations
0
Monitoring Violations
280
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MR 21 2020
Coliform (TCR) MR 10 2009
Lead and Copper Rule MR 9 2024
Arsenic MR 6 1999
Barium MR 4 2002
Chromium MR 4 2002
Beryllium, Total MR 4 2002
Thallium, Total MR 4 2002
Selenium MR 4 2002
BHC-GAMMA MR 4 2002
Methoxychlor MR 4 2002
Dalapon MR 4 2002
Di(2-ethylhexyl) adipate MR 4 2002
OXAMYL MR 4 2002
Di(2-ethylhexyl) phthalate MR 4 2002
Picloram MR 4 2002
Dinoseb MR 4 2002
Hexachlorocyclopentadiene MR 4 2002
Aldicarb sulfoxide MR 4 2002
Atrazine MR 4 2002
LASSO MR 4 2002
Heptachlor epoxide MR 4 2002
2,4-D MR 4 2002
2,4,5-TP MR 4 2002
HEXACHLOROBENZENE MR 4 2002
Benzo(a)pyrene MR 4 2002
1,2,4-Trichlorobenzene MR 4 2002
cis-1,2-Dichloroethylene MR 4 2002
p-Dichlorobenzene MR 4 2002
trans-1,2-Dichloroethylene MR 4 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 Park Garden Estates.

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 MT0000050 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 9 SDWIS / MT0000050 / 5000
2021 Consumer Confidence Rule Other 4 SDWIS / MT0000050 / 7000
2020 Gross Alpha, Excl. Radon and U MR 21 SDWIS / MT0000050 / 4000
2009 Coliform (TCR) MR 10 SDWIS / MT0000050 / 3100
2005 Nitrate-Nitrite MR 3 SDWIS / MT0000050 / 1038
2002 Barium MR 4 SDWIS / MT0000050 / 1010
2002 Chromium MR 4 SDWIS / MT0000050 / 1020
2002 Beryllium, Total MR 4 SDWIS / MT0000050 / 1075
2002 Thallium, Total MR 4 SDWIS / MT0000050 / 1085
2002 Selenium MR 4 SDWIS / MT0000050 / 1045
2002 BHC-GAMMA MR 4 SDWIS / MT0000050 / 2010
2002 Methoxychlor MR 4 SDWIS / MT0000050 / 2015
2002 Dalapon MR 4 SDWIS / MT0000050 / 2031
2002 Di(2-ethylhexyl) adipate MR 4 SDWIS / MT0000050 / 2035
2002 OXAMYL MR 4 SDWIS / MT0000050 / 2036

How Park Garden Estates Compares

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

Metric Park Garden Estates Montana avg Federal benchmark
Total violations 286 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 50 492 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 Park Garden Estates water safe to drink? ▼
Park Garden Estates (PWS ID: MT0000050) has 286 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 50 people using Groundwater sources.
How many people does Park Garden Estates serve? ▼
Park Garden Estates serves 50 people in Great Falls, Montana. It is a Private-owned system using Groundwater water sources with 16 service connections.
What type of violations does Park Garden Estates have? ▼
Park Garden Estates has 286 total violations: 0 health-based violations (MCL exceedances or treatment failures), 280 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Park Garden Estates water? ▼
No PFAS testing data is available for Park Garden Estates under the EPA's UCMR5 monitoring program.
What water source does Park Garden Estates use? ▼
Park Garden Estates 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.