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SAINT LAWRENCE

PWS ID: SD4600286 · MILLER, South Dakota 57362

SAINT LAWRENCE serves 198 people in MILLER, South Dakota using Surface Water water sources. It has 263 recorded EPA violations, including 44 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SAINT LAWRENCE

SAINT LAWRENCE is a local-owned community water system that delivers drinking water to 198 residents in MILLER, South Dakota (Hand County) through 107 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 263 total violations for this system , of which 44 (17%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 190 monitoring and reporting violations are on file. The most recent violation on record dates to 1997.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 44 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. SAINT LAWRENCE's 263 violations sit above the South Dakota average. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%). 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
198
Total Violations
263
Health-Based Violations
44
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
107
County
Hand
School/Daycare
No
MCL Violations
44
Monitoring Violations
190
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 44 1996
Coliform (TCR) MR 34 1997
Lead and Copper Rule MR 10 1996
Coliform (TCR) Other 9 1997
Gross Alpha, Excl. Radon and U MR 3 1988
Combined Radium (-226 and -228) MR 3 1988
Heptachlor MR 3 1993
Methoxychlor MR 3 1993
Di(2-ethylhexyl) adipate MR 3 1993
Di(2-ethylhexyl) phthalate MR 3 1993
Endrin MR 3 1993
HEXACHLOROBENZENE MR 3 1993
BHC-GAMMA MR 3 1993
Toxaphene MR 3 1993
Simazine MR 3 1993
Aldicarb sulfone MR 3 1993
Dalapon MR 3 1993
Dinoseb MR 3 1993
2,4,5-TP MR 3 1993
Pentachlorophenol MR 3 1993
2,4-D MR 3 1993
1,2-DIBROMO-3-CHLOROPROPANE MR 3 1993
Endothall MR 3 1993
Glyphosate MR 3 1993
Atrazine MR 3 1993
Hexachlorocyclopentadiene MR 3 1993
Total Polychlorinated Biphenyls (PCB) MR 3 1993
Heptachlor epoxide MR 3 1993
ETHYLENE DIBROMIDE MR 3 1993
OXAMYL MR 3 1993

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 LAWRENCE.

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 SD4600286 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota'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 SD 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
1997 Coliform (TCR) MR 34 SDWIS / SD4600286 / 3100
1997 Coliform (TCR) Other 9 SDWIS / SD4600286 / 3100
1996 Coliform (TCR) MCL 44 SDWIS / SD4600286 / 3100
1996 Lead and Copper Rule MR 10 SDWIS / SD4600286 / 5000
1995 Tetrachloroethylene MR 2 SDWIS / SD4600286 / 2987
1995 Ethylbenzene MR 2 SDWIS / SD4600286 / 2992
1995 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4600286 / 2378
1995 CHLOROBENZENE MR 2 SDWIS / SD4600286 / 2989
1995 o-Dichlorobenzene MR 2 SDWIS / SD4600286 / 2968
1995 1,2-Dichloropropane MR 2 SDWIS / SD4600286 / 2983
1995 Benzene MR 2 SDWIS / SD4600286 / 2990
1995 Trichloroethylene MR 2 SDWIS / SD4600286 / 2984
1995 Toluene MR 2 SDWIS / SD4600286 / 2991
1995 Carbon tetrachloride MR 2 SDWIS / SD4600286 / 2982
1995 1,2-Dichloroethane MR 2 SDWIS / SD4600286 / 2980

How SAINT LAWRENCE Compares

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

Metric SAINT LAWRENCE South Dakota avg Federal benchmark
Total violations 263 86 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 44 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 198 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

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 SAINT LAWRENCE water safe to drink? ▼
SAINT LAWRENCE (PWS ID: SD4600286) has 263 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 198 people using Surface Water sources.
How many people does SAINT LAWRENCE serve? ▼
SAINT LAWRENCE serves 198 people in MILLER, South Dakota. It is a Local-owned system using Surface Water water sources with 107 service connections.
What type of violations does SAINT LAWRENCE have? ▼
SAINT LAWRENCE has 263 total violations: 44 health-based violations (MCL exceedances or treatment failures), 190 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SAINT LAWRENCE water? ▼
No PFAS testing data is available for SAINT LAWRENCE under the EPA's UCMR5 monitoring program.
What water source does SAINT LAWRENCE use? ▼
SAINT LAWRENCE uses Surface Water 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.

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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.

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