Thallium in Colorado Drinking Water
171 public water systems in Colorado have historical EPA violation records associated with thallium in the Q2 2026 snapshot.
267
Historical Records in Colorado
171
Systems With Records
About Thallium
- EPA Limit
- 2 ppb
- Category
- Inorganic
- Health Effects
- Hair loss, kidney, intestine, liver problems
- Common Treatment Approaches
- Ion exchange, activated alumina
Colorado Systems With the Most Thallium Records
LAME DEER WATER SYSTEM
2,605 served3 historical records
C
HOT SPRINGS COURT
55 served2 historical records
D
CROW AGENCY WATER SYSTEM
2,057 served2 historical records
C
WHITE MESA WATER SYSTEM
300 served2 historical records
C
DAKOTA MAGIC CASINO
2,360 served2 historical records
D
URIAH HEEPS SPRING WATER SYSTEM
3,750 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
ARAPAHOE INDUSTRIAL PARK
650 served1 historical record
B
PRYOR WATER SYSTEM
406 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
MISSION DAM WATER SYSTEM
87 served1 historical record
B
FORT BELKNAP AGENCY WATER SYSTEM
2,600 served1 historical record
F
FORT WASHAKIE
2,620 served1 historical record
B
FOUR BEARS WATER SYSTEM
1,200 served1 historical record
C
MANDAREE WATER PLANT
1,034 served1 historical record
A
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.