Arsenic in Colorado Drinking Water
154 public water systems in Colorado have historical EPA violation records associated with arsenic in the Q2 2026 snapshot.
304
Historical Records in Colorado
154
Systems With Records
About Arsenic
- EPA Limit
- 10 ppb
- Category
- Inorganic
- Health Effects
- Skin damage, circulatory problems, increased cancer risk
- Common Treatment Approaches
- Reverse osmosis, distillation
Colorado Systems With the Most Arsenic Records
DIXON (OLD AGENCY)
72 served6 historical records
B
LAME DEER WATER SYSTEM
2,605 served3 historical records
C
HOT SPRINGS COURT
55 served2 historical records
D
SPIRIT LAKE WATER MANAGEMENT RWS
4,400 served2 historical records
A
WHITE MESA WATER SYSTEM
300 served2 historical records
C
DAKOTA MAGIC CASINO
2,360 served2 historical records
D
POTATO CREEK WATER SYSTEM
95 served2 historical records
C
ROSEBUD RURAL WATER SYSTEM
5,500 served1 historical record
B
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
FORT BELKNAP AGENCY WATER SYSTEM
2,600 served1 historical record
F
ETHETE WATER SYSTEM
1,950 served1 historical record
C
URIAH HEEPS SPRING WATER SYSTEM
3,750 served1 historical record
D
HEART BUTTE SCHOOL
250 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.