Casper Water Quality
Wyoming
According to EPA SDWIS, Casper, Wyoming is served by 13 community water systems covering about 63,844 people. The same extract lists 13 health-based violation records, most recently coded 5000 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Casper, Wyoming is delivered through 13 EPA-regulated community water systems serving an estimated 63,844 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.
PlainEnviro's health-based SDWIS extract shows 13 violation records across the 13 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: Lead and Copper Rule, Surface Water Treatment Rule. 6 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. 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 |
| VISTA WEST WATER COMPANY | 1,600 | 0 | Clean |
| PIONEER WATER & SEWER DISTRICT | 1,500 | 0 | Clean |
| NATRONA COUNTY INT'L AIRPORT | 423 | 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?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| BROKEN WRENCH LLC | Lead and Copper Rule | 2024-02-29 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2024-01-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2023-10-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2023-07-01 |
| NATRONA COUNTY INT'L AIRPORT | Lead and Copper Rule | 2023-04-01 |
| NATRONA COUNTY INT'L AIRPORT | Lead and Copper Rule | 2023-04-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2023-04-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2023-04-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2023-04-01 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2022-11-30 |
| BROKEN WRENCH LLC | Lead and Copper Rule | 2022-11-30 |
| MILE-HI I&S DISTRICT | Lead and Copper Rule | 2020-04-01 |
| POISON SPIDER I&S DISTRICT | Surface Water Treatment Rule | 1992-01-01 |
What are Casper's health-based records for?
Casper's health-based violation records carry 2 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Lead and Copper Rule | 12 | 3 |
| Surface Water Treatment Rule | 1 | 1 |
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
What does EPA SDWIS list for drinking water in Casper, Wyoming? ▼
How many water violations does Casper have in this EPA extract? ▼
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? ▼
How does Casper compare in Wyoming?
Of the 115 Wyoming places with at least one community water system on file, Casper ranks #4 by number of systems (13).
Either side of it: Wilson (20), Cheyenne (14), Jackson (12), Rock Springs (11)
About This Data
Figures here are the current EPA SDWIS extract joined to the 13 community water systems whose service area lists Casper, ranked against the 115 Wyoming places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
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.