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Water system · PWSID SD4680004

ELLSWORTH AFB

ELLSWORTH AFB, SD · ~9,100 people served

Check your exact address → ELLSWORTH AFB overview
100
Excellent
PurityRadar safety score

PWSID

SD4680004

State

South Dakota

City

ELLSWORTH AFB

Population served

9,100

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Nov 2023). Levels in parts per trillion (ppt).

Lithium

9,630 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

4

Health-based

16

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2014. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Oct 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2014 Resolved
Other began Apr 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2005 Resolved

Recent enforcement actions

  • State action · SOX Dec 2014
  • State action · SIF Oct 2014
  • State action · SIE Oct 2014
  • State action · SOX Oct 2014
  • State action · SOX Oct 2014
  • State action · SIF Aug 2014
  • State action · SIF Aug 2014
  • State action · SIE Aug 2014

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Aug 2021

2.74 · max 2.74 mg/l as N · 2

Arsenic

1 station · latest Aug 2021

0.57 · max 0.57 ug/l · 1

Fluoride

1 station · latest Aug 2021

0.58 · max 0.58 mg/l · 1

Manganese

1 station · latest Aug 2021

158 · max 158 ug/l · 1

Uranium

1 station · latest Aug 2021

46.4 · max 46.4 ug/l · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system SD4680004 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.