B75/100
ELLSWORTH AFB — Water Quality Report 2026
Serving 9,100 people · South Dakota
Water Source
Purchased Surface Water
County
—
System ID
SD4680004
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About ELLSWORTH AFB
Is ELLSWORTH AFB water safe to drink?
ELLSWORTH AFB water receives a grade of B (75/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ELLSWORTH AFB detected?
31 contaminants were tested in ELLSWORTH AFB's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ELLSWORTH AFB have any EPA violations?
Yes, ELLSWORTH AFB has 6 EPA violation(s) on record, with the most recent in 2014. Violation types include MCL, Other, MR. 4 are health-based violations.
How many people does ELLSWORTH AFB serve?
ELLSWORTH AFB serves approximately 9,100 people, South Dakota. The system provides water to 1 community: Ellsworth Afb.
What type of water does ELLSWORTH AFB provide?
ELLSWORTH AFB sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is SD4680004.
How does ELLSWORTH AFB compare to other utilities in South Dakota?
ELLSWORTH AFB scores 75/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our South Dakota state page for a full comparison of water systems.