Arsenic in Wyoming Drinking Water
Wyoming has 1,877 public water systems. 1405 have recorded arsenic violations.
Total Systems
1,877
With Violations
1,405
EPA MCL
0.01
Population Served
638K
Arsenic in Wyoming: Key Facts
Total Water Systems
1,877
Systems with Violations
1,405
Lead Violations
6
Copper Violations
45
EPA Standard
0.01 mg/L
MCLG (goal): 0 mg/L
Water Systems with Violations in Wyoming
| System | Population | Violations |
|---|---|---|
| MARBLETON, TOWN OF | 861 | 1526 |
| SWEETWATER I&S DISTRICT | 46 | 1437 |
| ALCOVA DAM RV PARK | 30 | 732 |
| BTNF-BLACKROCK WORK CENTER | 50 | 679 |
| LEISURE VALLEY INC/ STAR VALLEY RV PARK | 2K | 665 |
| ETHETE WATER SYSTEM | 2K | 639 |
| JEFFREY CITY WATER & SEWER DISTRICT | 40 | 598 |
| ARAPAHOE COMM WATER SYSTEM | 3K | 585 |
Health Effects of Arsenic Exposure
Cancer risk
Skin, bladder, and lung cancers with long-term exposure
Cardiovascular effects
Increased risk of heart disease and stroke
Diabetes risk
Associated with increased risk of type 2 diabetes
Increased risk of cancer (skin, bladder, lung). Thickening and discoloration of skin; numbness; circulatory problems.
Frequently Asked Questions
Is there arsenic in Wyoming water?
Wyoming has 1,877 public water systems. 1405 have recorded arsenic violations based on EPA SDWIS data. If you are on a private well, your water is not covered by these regulations and should be tested independently.
How can I check my Wyoming water for arsenic?
Search for your water system using the WaterCheck system lookup, or contact your utility and request a copy of your Consumer Confidence Report (CCR). The CCR is published annually and lists all detected contaminants, their levels, and the EPA MCLs. For private wells, contact a state-certified lab for independent testing.
What is the EPA limit for arsenic?
The EPA Maximum Contaminant Level (MCL) for arsenic is 0.01 mg/L. Systems that exceed MCLs are required to notify customers and take corrective action.
Arsenic at a Glance
Source
Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes
How to Filter Arsenic
- +Reverse osmosis effectively removes arsenic
- +Distillation also removes arsenic
- +Standard carbon filters do NOT remove arsenic reliably
- +Test well water annually if on a private well