A88/100
CASPER, CITY OF — Water Quality Report 2026
Serving 59,000 people · Wyoming
Water Source
Purchased Surface Water
County
—
System ID
WY5601415
Violations
2
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 610.00 µg/L | — | Above Goal |
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 1997.
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 CASPER, CITY OF
Is CASPER, CITY OF water safe to drink?
CASPER, CITY OF water receives a grade of A (88/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CASPER, CITY OF detected?
69 contaminants were tested in CASPER, CITY OF's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does CASPER, CITY OF have any EPA violations?
Yes, CASPER, CITY OF has 2 EPA violation(s) on record, with the most recent in 1997. Violation types include MCL, MR. 1 are health-based violations.
How many people does CASPER, CITY OF serve?
CASPER, CITY OF serves approximately 59,000 people, Wyoming. The system provides water to 1 community: Casper.
What type of water does CASPER, CITY OF provide?
CASPER, CITY OF 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 WY5601415.
How does CASPER, CITY OF compare to other utilities in Wyoming?
CASPER, CITY OF scores 88/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Wyoming state page for a full comparison of water systems.