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Community Water System · PWS MN1270050

Saint Louis Park

St. Louis Park, Minnesota 55416 - drinking water served from groundwater sources to 50,010 people, tracked in EPA SDWIS and UCMR5.

50,010
People served
14
EPA violations
14
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 14 drinking-water violations at Saint Louis Park, 100% of them health-based - above the Minnesota per-system average, and UCMR5 testing detected 1 PFAS compound.

14
Total EPA violations on record
100%
Health-based (MCL / treatment failure)
50,010
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Saint Louis Park

Saint Louis Park is a local-owned community water system that delivers drinking water to 50,010 residents in St. Louis Park, Minnesota (Hennepin County) through 13,775 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 14 total violations for this system , of which 14 (100%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. The most recent violation on record dates to 2008.

The most frequently cited contaminant at this system is Gross Alpha, Excl. Radon and U, recorded in 10 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 11.9 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Minnesota, EPA tracks 6,557 public water systems serving 5,239,398 people, with 59,895 cumulative violations and 36,496 health-based violations on record. About 52% of systems in the state carry at least one violation, and state-wide the average per system is 9.1 violations. Statewide, 149 of 196 UCMR5-tested systems have reported PFAS detections (76%).

Saint Louis Park's 14 violations sit above the Minnesota average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
50,010
Total Violations
14
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
13,775
County
Hennepin
School/Daycare
No
MCL Violations
14
Monitoring Violations
0
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MCL 10 2008
Combined Radium (-226 and -228) MCL 4 2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 348 samples detected PFAS.

Contaminant Date Result MRL Status
PFDA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/19/2023 <2.00 ppt 2.00 ppt Not Detected
PFNA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 7/19/2023 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 7/19/2023 <7.00 ppt 7.00 ppt Not Detected
PFDoA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 7/19/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 7/19/2023 <20.00 ppt 20.00 ppt Not Detected
PFHxA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/19/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/19/2023 5.40 ppt 5.00 ppt Detected
6:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFBA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/19/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 7/19/2023 <6.00 ppt 6.00 ppt Not Detected
PFHxS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 7/19/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected

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 Saint Louis 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 MN1270050 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Minnesota Drinking Water Authority

Minnesota'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 MN 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
2008 Gross Alpha, Excl. Radon and U MCL 10 SDWIS / MN1270050 / 4000
2008 Combined Radium (-226 and -228) MCL 4 SDWIS / MN1270050 / 4010

How Saint Louis Park Compares

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

Metric Saint Louis Park Minnesota avg Federal benchmark
Total violations 14 9.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 14 5.6 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 76% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 50,010 799 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 6,557 regulated public water systems in Minnesota.

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 Saint Louis Park water safe to drink? ▼
Saint Louis Park (PWS ID: MN1270050) has 14 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 50,010 people using Groundwater sources.
How many people does Saint Louis Park serve? ▼
Saint Louis Park serves 50,010 people in St. Louis Park, Minnesota. It is a Local-owned system using Groundwater water sources with 13,775 service connections.
What type of violations does Saint Louis Park have? ▼
Saint Louis Park has 14 total violations: 14 health-based violations (MCL exceedances or treatment failures), 0 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Saint Louis Park water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in Saint Louis Park's water supply: PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Saint Louis Park use? ▼
Saint Louis 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.