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St. Francis, SD Tap Water Quality 2026

Water quality report for St. Francis, SD — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at St. Francis's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: St. Francis PWSID: 084690020 Updated: 2026 Q2
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1 violation currently open

Lead is 0.18 ppb, 1% of the action level. No PFAS was detected.

D

St. Francis earns a D for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 0.18 ppb — 1% of the federal action level
PFAS tested, none detected
16 violations since 2015, 2 health-based
1 violation currently open
St. Francis's lead level vs. all South Dakota community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 0.18 ppb — 1% of the federal action level
✓ Lower lead than 100% of South Dakota utilities
Population Served
235
~800 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
1
1 open of 16 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
1% of EPA action level
0.18 ppb
Action level: 15 ppb
The 90th-percentile lead result is 0.18 ppb, 1% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Unaddressed
E. COLI MONITORING AND REPORTING — 0 2024 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2023 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2018–2023 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2018–2023 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2018–2023 Resolved
Radium-226 MONITORING AND REPORTING — — 2018–2023 Resolved
Radium-228 MONITORING AND REPORTING — — 2018–2023 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2017–2019 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2016 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violation remains open, out of 16 recorded since 2015 (2 health-based).

About the Main Water System

Utility St. Francis
PWSID 084690020
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 235
Service connections 800
Systems serving this area 2
Regulator US EPA (tribal primacy)
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is St. Francis tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 0.18 ppb, 1% of the action level.
Does St. Francis water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to St. Francis? ▼
St. Francis (PWSID 084690020), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2022-09-14. Inspectors recorded 2 significant deficiencies.

What Should St. Francis Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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