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Community Water System · PWS MT0004021

Magnolia Estates

Missoula, Montana 59801 - drinking water served from groundwater sources to 140 people, tracked in EPA SDWIS and UCMR5.

140
People served
130
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 130 drinking-water violations at Magnolia Estates - below the Montana per-system average.

130
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
140
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Magnolia Estates

Magnolia Estates is a private-owned community water system that delivers drinking water to 140 residents in Missoula, Montana (Missoula County) through 57 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 130 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 123 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 7 violations (Other). 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%).

Magnolia Estates's 130 violations sit below 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
140
Total Violations
130
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
57
County
Missoula
School/Daycare
No
MCL Violations
0
Monitoring Violations
123
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 7 2013
Nitrate-Nitrite MR 6 2006
Lead and Copper Rule MR 4 2002
Arsenic MR 3 2002
Chromium MR 3 2002
Fluoride MR 3 2002
Antimony, Total MR 3 2002
Beryllium, Total MR 3 2002
Thallium, Total MR 3 2002
Selenium MR 3 2002
Di(2-ethylhexyl) adipate MR 3 2002
Di(2-ethylhexyl) phthalate MR 3 2002
Picloram MR 3 2002
Hexachlorocyclopentadiene MR 3 2002
Aldicarb sulfoxide MR 3 2002
Aldicarb sulfone MR 3 2002
Aldicarb MR 3 2002
Atrazine MR 3 2002
LASSO MR 3 2002
Heptachlor epoxide MR 3 2002
2,4-D MR 3 2002
HEXACHLOROBENZENE MR 3 2002
Benzo(a)pyrene MR 3 2002
OXAMYL MR 3 2002
Cadmium MR 3 2002
Endrin MR 3 2002
Toxaphene MR 3 2002
Nickel MR 3 2002
2,4,5-TP MR 3 2002
Simazine 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 Magnolia 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 MT0004021 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
2013 Consumer Confidence Rule Other 7 SDWIS / MT0004021 / 7000
2011 Asbestos MR 2 SDWIS / MT0004021 / 1094
2006 Nitrate-Nitrite MR 6 SDWIS / MT0004021 / 1038
2002 Lead and Copper Rule MR 4 SDWIS / MT0004021 / 5000
2002 Arsenic MR 3 SDWIS / MT0004021 / 1005
2002 Chromium MR 3 SDWIS / MT0004021 / 1020
2002 Fluoride MR 3 SDWIS / MT0004021 / 1025
2002 Antimony, Total MR 3 SDWIS / MT0004021 / 1074
2002 Beryllium, Total MR 3 SDWIS / MT0004021 / 1075
2002 Thallium, Total MR 3 SDWIS / MT0004021 / 1085
2002 Selenium MR 3 SDWIS / MT0004021 / 1045
2002 Di(2-ethylhexyl) adipate MR 3 SDWIS / MT0004021 / 2035
2002 Di(2-ethylhexyl) phthalate MR 3 SDWIS / MT0004021 / 2039
2002 Picloram MR 3 SDWIS / MT0004021 / 2040
2002 Hexachlorocyclopentadiene MR 3 SDWIS / MT0004021 / 2042

How Magnolia Estates Compares

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

Metric Magnolia Estates Montana avg Federal benchmark
Total violations 130 131.4 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 62.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 140 492 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 Magnolia Estates water safe to drink? ▼
Magnolia Estates (PWS ID: MT0004021) has 130 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 140 people using Groundwater sources.
How many people does Magnolia Estates serve? ▼
Magnolia Estates serves 140 people in Missoula, Montana. It is a Private-owned system using Groundwater water sources with 57 service connections.
What type of violations does Magnolia Estates have? ▼
Magnolia Estates has 130 total violations: 0 health-based violations (MCL exceedances or treatment failures), 123 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Magnolia Estates water? ▼
No PFAS testing data is available for Magnolia Estates under the EPA's UCMR5 monitoring program.
What water source does Magnolia Estates use? ▼
Magnolia 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.