PlainWater

WILLIAMS CITY OF

PWS ID: AZ0403026 · WILLIAMS, Arizona 86046

Population Served
3,145
Total Violations
314
Health-Based Violations
23
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,883
County
Coconino
School/Daycare
No
MCL Violations
6
Monitoring Violations
248
Treatment Tech Violations
17

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 30 2025
Coliform (TCR) MR 28 2015
Interim Enhanced Surface Water Treatment Rule MR 21 2022
Consumer Confidence Rule Other 20 2025
TTHM MR 19 2016
Total Haloacetic Acids (HAA5) MR 19 2012
Surface Water Treatment Rule MR 16 2022
E. COLI MR 16 2018
Interim Enhanced Surface Water Treatment Rule TT 11 2023
Public Notice Other 6 2023
CARBON, TOTAL TT 6 2022
TTHM MCL 4 2006
Lead and Copper Rule MR 4 2021
CARBON, TOTAL MR 4 2023
cis-1,2-Dichloroethylene MR 3 1999
o-Dichlorobenzene MR 3 1999
p-Dichlorobenzene MR 3 1999
1,2-Dichloroethane MR 3 1999
2,4-D MR 3 1999
DICHLOROMETHANE MR 3 1999
1,1-Dichloroethylene MR 3 1999
1,1,1-Trichloroethane MR 3 1999
Carbon tetrachloride MR 3 1999
CHLOROBENZENE MR 3 1999
Benzene MR 3 1999
Styrene MR 3 1999
1,2-Dichloropropane MR 3 1999
Trichloroethylene MR 3 1999
1,1,2-Trichloroethane MR 3 1999
trans-1,2-Dichloroethylene MR 3 1999
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.