Community Water System · PWS MN1700007
Prior Lake
Prior Lake, Minnesota 55372 - drinking water served from groundwater sources to 25,282 people, tracked in EPA SDWIS and UCMR5.
- 25,282
- People served
- 4
- EPA violations
- 0
- Health-based
- No PFAS
- UCMR5 result
The verdict
EPA records 4 drinking-water violations at Prior Lake - below the Minnesota per-system average.
- 4
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
- 25,282
- People served by this system
- 0
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Prior Lake
Prior Lake is a local-owned community water system that delivers drinking water to 25,282 residents in Prior Lake, Minnesota (Scott County) through 9,771 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 4 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.
No specific contaminant violations have been recorded in EPA's detailed violation register for this system. This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.
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%).
Prior Lake's 4 violations sit below 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.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 9,771
- County
- Scott
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 8:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 7/21/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 7/21/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 7/21/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 7/21/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 10/21/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 10/21/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 10/21/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHpS | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 10/21/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 10/21/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 10/21/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 10/21/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 6:2 FTS | 10/21/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 10/21/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 10/21/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 10/21/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 10/21/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 10/21/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 10/21/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 10/21/2024 | <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 Prior Lake.
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 MN1700007 on SDWISSource: EPA SDWIS Federal Reports Search
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 SDWISHow Prior Lake Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Prior Lake | Minnesota avg | Federal benchmark |
|---|---|---|---|
| Total violations | 4 | 9.1 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 0 | 5.6 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 76% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 25,282 | 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 Prior Lake water safe to drink? ▼
How many people does Prior Lake serve? ▼
What type of violations does Prior Lake have? ▼
Has PFAS been detected in Prior Lake water? ▼
What water source does Prior Lake use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
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.