Casper Water Quality
Wyoming
The tap water in Casper, Wyoming is served by 14 EPA-regulated water systems covering approximately 66,524 people. 13 health-based violations are on record, most recently for 5000 in 2024. Data source: EPA Safe Drinking Water Information System.
Drinking water in Casper, Wyoming is delivered through 14 EPA-regulated community water systems serving an estimated 66,524 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Casper shows 13 total violations across all 14 systems, of which 13 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 5000, 0200. 6 TRI-reporting industrial facilities are also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Wyoming drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CASPER, CITY OF | 59,000 | 0 | Clean |
| EVANSVILLE, TOWN OF | 2,728 | 0 | Clean |
| VISTA WEST WATER COMPANY | 1,600 | 0 | Clean |
| PIONEER WATER & SEWER DISTRICT | 1,500 | 0 | Clean |
| NATRONA COUNTY INT'L AIRPORT | 375 | 2 | Health |
| RIVERSIDE MOBILE HOME COURT | 330 | 0 | Clean |
| AIR BASE ACRES I&S DISTRICT | 236 | 0 | Clean |
| POISON SPIDER I&S DISTRICT | 200 | 1 | Health |
| LEX MOBILE HOME PARK | 172 | 0 | Clean |
| SANDY LAKE ESTATES I&S DISTRICT | 150 | 0 | Clean |
| PLEASANT VIEW WATER COMPANY | 130 | 0 | Clean |
| MILE-HI I&S DISTRICT | 48 | 1 | Health |
| BROKEN WRENCH LLC | 30 | 9 | Health |
| CENTRAL WY REGIONAL WATER SYSTEM JPB | 25 | 0 | Clean |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 5000 | 2024-02-29 |
| 5000 | 2024-01-01 |
| 5000 | 2023-10-01 |
| 5000 | 2023-07-01 |
| 5000 | 2023-04-01 |
| 5000 | 2023-04-01 |
| 5000 | 2023-04-01 |
| 5000 | 2023-04-01 |
| 5000 | 2023-04-01 |
| 5000 | 2022-11-30 |
| 5000 | 2022-11-30 |
| 5000 | 2020-04-01 |
| 0200 | 1992-01-01 |
TRI Facilities in Casper
| Facility | Total Releases |
|---|---|
| Hf Sinclair Casper Refining LLC | 110.8K lbs |
| Custom Fiberglass Inc | 32.2K lbs |
| Tallgrass Midstream LLC - Casper Gas Plant & Compressor Stat | 3.7K lbs |
| Truenorth Steel-Casper | 480 lbs |
| Knife River Casper | 112 lbs |
| Knife River Materials Yard | 58 lbs |
Frequently Asked Questions
Is Casper, Wyoming water safe to drink? ▼
How many water violations does Casper have? ▼
What contaminants were found in Casper water? ▼
How many water systems serve Casper? ▼
Where does Casper get its drinking water? ▼
Are there pollution sources near Casper? ▼
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.