Selenium in Colorado Drinking Water
146 public water systems in Colorado have historical EPA violation records associated with selenium in the Q2 2026 snapshot.
210
Historical Records in Colorado
146
Systems With Records
About Selenium
- EPA Limit
- 50 ppb
- Category
- Inorganic
- Health Effects
- Hair or fingernail loss, numbness, circulatory problems
- Common Treatment Approaches
- Reverse osmosis, activated alumina
Colorado Systems With the Most Selenium Records
LAME DEER WATER SYSTEM
2,605 served3 historical records
C
CROW AGENCY WATER SYSTEM
2,057 served2 historical records
C
DAKOTA MAGIC CASINO
2,360 served2 historical records
D
CROW CREEK SIOUX TRIBE WATER SYSTEM
130 served1 historical record
B
FORT THOMPSON WATER SYSTEM
1,357 served1 historical record
B
HOT SPRINGS COURT
55 served1 historical record
D
PRYOR WATER SYSTEM
406 served1 historical record
C
WHITE MESA WATER SYSTEM
300 served1 historical record
C
BEDROCKBABB WATER SYSTEM
645 served1 historical record
C
PEEVER FLATS WATER SYSTEM
129 served1 historical record
A
RED IRON LAKE WATER SYSTEM
95 served1 historical record
A
LONG HOLLOW WATER SYSTEM
265 served1 historical record
A
MNIHNAPA WATER SYSTEM
220 served1 historical record
A
FORT BELKNAP AGENCY WATER SYSTEM
2,600 served1 historical record
F
ETHETE WATER SYSTEM
1,950 served1 historical record
C
ARAPAHOE COMM WATER SYSTEM
4,100 served1 historical record
B
HEART BUTTE SCHOOL
250 served1 historical record
C
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.