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Box Elder, SD Tap Water Quality 2026

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

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

Main Utility: Box Elder PWSID: SD4600046 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. No PFAS was detected.

B

Box Elder earns a B for water quality

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

Lead: 2.00 ppb — 13% of the federal action level
PFAS tested, none detected
9 violations since 2015, 9 health-based
No violations currently open
Box Elder's lead level vs. all South Dakota community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 63% of South Dakota utilities
Population Served
9809
~4022 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
9 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% 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
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 16 PCI/L 15 pCi/L 2025 Archived
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 19 PCI/L 15 pCi/L 2025 Archived
Combined Radium (-226 and -228) MCL EXCEEDANCE 6 PCI/L 5 pCi/L 2024 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 8 PCI/L 5 pCi/L 2022 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 22 PCI/L 15 pCi/L 2022 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 19 PCI/L 15 pCi/L 2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 7 PCI/L 5 pCi/L 2022 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 16 PCI/L 15 pCi/L 2021 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6 PCI/L 5 pCi/L 2021 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

9 violations are on record since 2015, of which 9 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Box Elder
PWSID SD4600046
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 9,809
Service connections 4,022
Systems serving this area 5
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Box Elder tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does Box Elder water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Box Elder? ▼
Box Elder (PWSID SD4600046), one of 5 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-05-07. No significant deficiencies were recorded.

What Should Box Elder 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
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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