Arsenic in California Drinking Water
218 public water systems in California have historical EPA violation records associated with arsenic in the Q2 2026 snapshot.
1,765
Historical Records in California
218
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
California Systems With the Most Arsenic Records
Nambe Pueblo
800 served10 historical records
D
Jemez Pueblo
3,200 served3 historical records
C
Pojoaque South
3,644 served2 historical records
C
San Felipe Pueblo
4,335 served1 historical record
A
Zia Pueblo
775 served1 historical record
C
Zuni Pueblo
11,888 served1 historical record
B
Acoma Main
2,374 served1 historical record
D
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.