PlainWater
States → 05

SOUTH WATER TREATMENT PLANT (SWTP)

PWS ID: 055294506 · PRIOR LAKE, 05 55372

SOUTH WATER TREATMENT PLANT (SWTP) serves 24,959 people in PRIOR LAKE, 05 using Groundwater water sources. It has 142 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SOUTH WATER TREATMENT PLANT (SWTP)

SOUTH WATER TREATMENT PLANT (SWTP) is a native american-owned community water system that delivers drinking water to 24,959 residents in PRIOR LAKE, 05 through 225 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 142 total violations for this system , of which 4 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 138 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 4 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across 05, EPA tracks 113 public water systems serving 144,290 people, with 19,546 cumulative violations and 443 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 173 violations. SOUTH WATER TREATMENT PLANT (SWTP)'s 142 violations sit below the 05 average. Statewide, 5 of 13 UCMR5-tested systems have reported PFAS detections (38.5%). 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
24,959
Total Violations
142
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
225
School/Daycare
No
MCL Violations
4
Monitoring Violations
138
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 2004
Nitrate MR 4 2019
Endrin MR 4 2017
BHC-GAMMA MR 4 2017
Methoxychlor MR 4 2017
Dalapon MR 4 2017
Diquat MR 4 2017
Glyphosate MR 4 2017
Di(2-ethylhexyl) adipate MR 4 2017
Simazine MR 4 2017
Picloram MR 4 2017
Dinoseb MR 4 2017
Aldicarb sulfone MR 4 2017
Aldicarb MR 4 2017
LASSO MR 4 2017
2,3,7,8-TCDD MR 4 2017
Heptachlor MR 4 2017
2,4-D MR 4 2017
2,4,5-TP MR 4 2017
Benzo(a)pyrene MR 4 2017
Chlordane MR 4 2017
Pentachlorophenol MR 4 2017
ETHYLENE DIBROMIDE MR 4 2017
Carbofuran MR 4 2017
Aldicarb sulfoxide MR 4 2017
OXAMYL MR 4 2017
Atrazine MR 4 2017
Heptachlor epoxide MR 4 2017
Toxaphene MR 4 2017
Endothall MR 4 2017

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/20/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFTA 5/20/2025 <0.008 µg/L 0.008 µg/L Not Detected
lithium 5/20/2025 <9 µg/L 9 µg/L Not Detected
6:2 FTS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 5/20/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 5/20/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 11/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 11/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 11/18/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 11/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 11/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 11/18/2024 <9 µg/L 9 µg/L Not Detected
PFTrDA 11/18/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFBS 11/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 11/18/2024 <0.003 µg/L 0.003 µg/L 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 SOUTH WATER TREATMENT PLANT (SWTP).

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 055294506 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

05 Drinking Water Authority

05'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 05 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
2019 Nitrate MR 4 SDWIS / 055294506 / 1040
2017 Endrin MR 4 SDWIS / 055294506 / 2005
2017 BHC-GAMMA MR 4 SDWIS / 055294506 / 2010
2017 Methoxychlor MR 4 SDWIS / 055294506 / 2015
2017 Dalapon MR 4 SDWIS / 055294506 / 2031
2017 Diquat MR 4 SDWIS / 055294506 / 2032
2017 Glyphosate MR 4 SDWIS / 055294506 / 2034
2017 Di(2-ethylhexyl) adipate MR 4 SDWIS / 055294506 / 2035
2017 Simazine MR 4 SDWIS / 055294506 / 2037
2017 Picloram MR 4 SDWIS / 055294506 / 2040
2017 Dinoseb MR 4 SDWIS / 055294506 / 2041
2017 Aldicarb sulfone MR 4 SDWIS / 055294506 / 2044
2017 Aldicarb MR 4 SDWIS / 055294506 / 2047
2017 LASSO MR 4 SDWIS / 055294506 / 2051
2017 2,3,7,8-TCDD MR 4 SDWIS / 055294506 / 2063

How SOUTH WATER TREATMENT PLANT (SWTP) Compares

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

Metric SOUTH WATER TREATMENT PLANT (SWTP) 05 avg Federal benchmark
Total violations 142 173 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 3.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 24,959 1,277 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 113 regulated public water systems in 05.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is SOUTH WATER TREATMENT PLANT (SWTP) water safe to drink? ▼
SOUTH WATER TREATMENT PLANT (SWTP) (PWS ID: 055294506) has 142 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 24,959 people using Groundwater sources.
How many people does SOUTH WATER TREATMENT PLANT (SWTP) serve? ▼
SOUTH WATER TREATMENT PLANT (SWTP) serves 24,959 people in PRIOR LAKE, 05. It is a Native American-owned system using Groundwater water sources with 225 service connections.
What type of violations does SOUTH WATER TREATMENT PLANT (SWTP) have? ▼
SOUTH WATER TREATMENT PLANT (SWTP) has 142 total violations: 4 health-based violations (MCL exceedances or treatment failures), 138 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SOUTH WATER TREATMENT PLANT (SWTP) water? ▼
No. SOUTH WATER TREATMENT PLANT (SWTP) was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does SOUTH WATER TREATMENT PLANT (SWTP) use? ▼
SOUTH WATER TREATMENT PLANT (SWTP) 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.

Explore PlainWater

Water in 05

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for 05

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial