Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0403026
PWS Name	WILLIAMS CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	3145
County Served	Coconino

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15190	Known	01-DEC-2025	31-DEC-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15191	Known	01-DEC-2025	31-DEC-2025	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	15189	Known	01-OCT-2025	31-DEC-2025	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	15188	Returned to Compliance	01-JUL-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	15187	Returned to Compliance	01-MAY-2025	31-MAY-2025	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	15134	Returned to Compliance	02-OCT-2023	-	No
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15133	Returned to Compliance	01-MAY-2023	31-MAY-2023	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15132	Returned to Compliance	01-APR-2023	30-APR-2023	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	15128	Returned to Compliance	31-JAN-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	15130	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	15115	Returned to Compliance	02-OCT-2022	-	No
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	15124	Returned to Compliance	01-OCT-2022	31-DEC-2022	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	15119	Returned to Compliance	01-OCT-2022	31-DEC-2022	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15117	Returned to Compliance	01-SEP-2022	30-SEP-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15116	Returned to Compliance	01-SEP-2022	30-SEP-2022	No
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	15125	Returned to Compliance	01-JUL-2022	30-SEP-2022	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15111	Returned to Compliance	01-MAR-2022	31-MAR-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15108	Returned to Compliance	01-JAN-2022	31-JAN-2022	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	15113	Returned to Compliance	01-JAN-2022	31-MAR-2022	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	15105	Returned to Compliance	01-OCT-2021	-	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15107	Returned to Compliance	01-OCT-2021	31-OCT-2021	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15103	Returned to Compliance	01-SEP-2021	30-SEP-2021	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15101	Returned to Compliance	01-MAR-2021	31-MAR-2021	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	15099	Returned to Compliance	31-JAN-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	15100	Returned to Compliance	31-JAN-2020	-	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15098	Returned to Compliance	01-JUN-2019	30-JUN-2019	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15097	Returned to Compliance	01-JUN-2019	30-JUN-2019	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15094	Returned to Compliance	09-DEC-2018	09-JAN-2019	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15095	Returned to Compliance	25-NOV-2018	25-DEC-2018	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15093	Returned to Compliance	11-NOV-2018	11-DEC-2018	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15092	Returned to Compliance	28-OCT-2018	28-NOV-2018	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15091	Returned to Compliance	14-OCT-2018	14-NOV-2018	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15090	Returned to Compliance	05-AUG-2018	05-SEP-2018	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	15089	Returned to Compliance	10-JUN-2018	10-JUL-2018	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15086	Returned to Compliance	01-MAR-2018	31-MAR-2018	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15088	Returned to Compliance	01-MAR-2018	31-MAR-2018	No
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15077	Returned to Compliance	01-JAN-2017	31-JAN-2017	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	15080	Returned to Compliance	01-NOV-2016	31-JAN-2017	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	15076	Returned to Compliance	01-OCT-2016	31-DEC-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	15063	Returned to Compliance	01-APR-2016	30-JUN-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	15053	Returned to Compliance	01-JAN-2016	31-MAR-2016	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	15052	Returned to Compliance	01-DEC-2015	31-DEC-2015	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	15051	Returned to Compliance	01-OCT-2015	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	15050	Returned to Compliance	01-SEP-2015	30-SEP-2015	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	15046	Returned to Compliance	01-JUN-2015	30-JUN-2015	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15081	Returned to Compliance	01-APR-2015	30-APR-2015	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	15082	Returned to Compliance	01-APR-2015	30-APR-2015	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15037	Returned to Compliance	01-DEC-2014	31-DEC-2014	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	15035	Returned to Compliance	01-NOV-2014	30-NOV-2014	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	15021	Returned to Compliance	01-OCT-2014	31-OCT-2014	No

1 - 50 of 239

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
3637	15189	SIE	State Public Notification requested	09-DEC-2025	State	-
3633	15188	SIA	State Violation/Reminder Notice	16-OCT-2025	State	-
3632	15187	SOX	State Compliance achieved	07-AUG-2025	State	System submitted updated May MRDL 8/7/25. Original submission said n/a for May. Closing as late. 8/8/25 LA7
3628	15134	SOX	State Compliance achieved	30-SEP-2024	State	Never received CCR cert for 2022. 2023 CCR completed on-time, CCR cert received 09/30/2024. JS26 3/18/2025
3580	15132	SOX	State Compliance achieved	09-AUG-2023	State	PN cert received on-time. JS26 8/9/2023
3581	15124	SOX	State Compliance achieved	09-AUG-2023	State	Q1 2023 TOCA results acceptable. JS26 8/9/2023
3580	15133	SOX	State Compliance achieved	09-AUG-2023	State	PN cert received on-time. JS26 8/9/2023
3581	15125	SOX	State Compliance achieved	09-AUG-2023	State	Q1 2023 TOCA results acceptable. JS26 8/9/2023
3570	15130	SOX	State Compliance achieved	31-MAY-2023	State	Late Feb TOCA data submitted 5/12/2023. JS26 5/31/2023
3561	15128	SOX	State Compliance achieved	08-MAY-2023	State	submitted PN late 3/14/2023
3543	15119	SOX	State Compliance achieved	10-FEB-2023	State	Late data submitted 2/3/2023. JS26 2/10/2023
3528	15116	SOX	State Compliance achieved	09-NOV-2022	State	Data submitted 10/14/2022. JS26 11/4/2022
3527	15105	SOX	State Compliance achieved	09-NOV-2022	State	System submitted 2022 PbCu results on 10/6/2022. JS26 11/9/2022
3528	15117	SOX	State Compliance achieved	09-NOV-2022	State	Data submitted 10/14/2022. JS26 11/4/2022
3536	15108	SOX	State Compliance achieved	09-NOV-2022	State	System submitted subsequent compliant continuous monitoring. JS26 11/9/2022
3526	15115	SOX	State Compliance achieved	21-OCT-2022	State	-
3523	15113	SOX	State Compliance achieved	20-MAY-2022	State	PWS SUBMITTED 1Q2022 MRDL REPORT LATE, SOX VIOLATION - JK5 05/20/2022
3518	15111	SOX	State Compliance achieved	18-APR-2022	State	PWS SUBMITTED MAR 2022 SWTR REPORT LATE ON 04/18/2022 - JK5 04/18/2022
3508	15103	SOX	State Compliance achieved	10-DEC-2021	State	PWS SUBMITTED SWTR DWAR 15A&B FOR NOV 2021 - JK5 03/09/2022
3508	15107	SOX	State Compliance achieved	10-DEC-2021	State	PWS SUBMITTED SWTR DWAR 15A&B FOR NOV 2021 - JK5 03/09/2022
3490	15101	SOX	State Compliance achieved	09-MAY-2021	State	PWS SUBMITTED CORRECT NUMBER OF SAMPLES IN APRIL 2021 SWTR DWAR 15 A&B - JK5 10/19/2021
3485	15099	SOX	State Compliance achieved	07-APR-2020	State	PWS SUBMITTED CERT OF DELIVERY FOR PN LATE ON 04/07/2020 - JK5 04/08/2020
3486	15100	SOX	State Compliance achieved	07-APR-2020	State	PWS SUBMITTED DELIVERY OF CERT LATE ON 4/7/2020 - JK5 04/08/2020
3476	15097	SOX	State Compliance achieved	29-JUL-2019	State	System submitted June 2019 SWTR data late on 07/29/2019 - EA5 10/01/2019
3476	15098	SOX	State Compliance achieved	29-JUL-2019	State	System submitted June 2019 SWTR data late on 07/29/2019 - EA5 10/01/2019
3458	15095	SIA	State Violation/Reminder Notice	21-FEB-2019	State	-
3456	15094	SIA	State Violation/Reminder Notice	21-FEB-2019	State	-
3452	15092	SIE	State Public Notification requested	30-JAN-2019	State	-
3448	15093	SIE	State Public Notification requested	30-JAN-2019	State	-
3463	15091	SOX	State Compliance achieved	15-JAN-2019	State	System submitted subsequent monitoring period results on 1/15/2019 HML 02/28/2019
3443	15090	SIA	State Violation/Reminder Notice	29-OCT-2018	State	-
3441	15089	SIA	State Violation/Reminder Notice	29-AUG-2018	State	-
3440	15088	SOX	State Compliance achieved	11-APR-2018	State	MARCH 2018 SWTR DATA SUBMITTED LATE ON 04/11/2018. CO3 04/23/2018
3440	15086	SOX	State Compliance achieved	11-APR-2018	State	MARCH 2018 SWTR DATA SUBMITTED LATE ON 04/11/2018. CO3 04/23/2018
3433	15082	SIA	State Violation/Reminder Notice	25-APR-2017	State	-
3431	15081	SIA	State Violation/Reminder Notice	25-APR-2017	State	-
3438	15080	SOX	State Compliance achieved	20-APR-2017	State	1Q2017 samples submitted on 04/20/2017. CO3
3423	15077	SIE	State Public Notification requested	23-MAR-2017	State	-
3420	15076	SIA	State Violation/Reminder Notice	08-MAR-2017	State	-
3419	15063	SOX	State Compliance achieved	11-JUL-2016	State	Data received 7/11/2016 LT6 10/11/2016
3416	15053	SOX	State Compliance achieved	13-APR-2016	State	Data Received 4/13/2016 LT6 7/05/2016
3415	15051	SOX	State Compliance achieved	10-FEB-2016	State	-
3414	15050	SOX	State Compliance achieved	04-FEB-2016	State	-
3414	15052	SOX	State Compliance achieved	04-FEB-2016	State	-
3409	15046	SIA	State Violation/Reminder Notice	17-AUG-2015	State	-
3405	15037	SOX	State Compliance achieved	14-APR-2015	State	-
3405	15035	SOX	State Compliance achieved	14-APR-2015	State	-
3405	15036	SOX	State Compliance achieved	14-APR-2015	State	-
3405	15042	SOX	State Compliance achieved	14-APR-2015	State	-
3405	15038	SOX	State Compliance achieved	14-APR-2015	State	-

1 - 50 of 230

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
IN-U030265SI - KAIBAB LAKE-PLT	11049	Yes	Intake	Surface water	Emergency	Active
XWL-55-529210	25225	Yes	Well	Ground water	Permanent	Inactive
XWL-55-577611	16291	Yes	Well	Ground water	Permanent	Inactive
WL-55-597241 - DOGTOWN 3	20895	Yes	Well	Ground water	Permanent	Active
WL-55-576327 - DOGTOWN 1	20894	Yes	Well	Ground water	Permanent	Active
XWL-55-584106 RODEO	16292	Yes	Well	Ground water	Emergency	Inactive
IN-U030264SI - DOGTOWN LAKE	11063	Yes	Intake	Surface water	Permanent	Active
IN-U030262SI - CITY DAM	11070	Yes	Intake	Surface water	Emergency	Active
IN-U030263SI - SANTA FE DAM	11069	Yes	Intake	Surface water	Emergency	Active
IN-U030261SI - CATARACT LAKE	11068	Yes	Intake	Surface water	Emergency	Active
EPDS001	8432	No	Clear Well	-	-	Active
DISTRIBUTION SYSTEM	13845	No	Distribution System/Zone	-	-	Active
RAWLT2	24776	No	Sampling Station	-	-	Active
EPDS003	26580	No	Sampling Station	-	-	Active
XEPHIS	18064	No	Sampling Station	-	-	Inactive
XEPDS002	25350	No	Sampling Station	-	-	Inactive
STORAGE TANK 001 - 280,000	19929	No	Storage	-	-	Active
STORAGE TANK 002 - 350,000	19930	No	Storage	-	-	Active
STORAGE TANK 003 - 750,000	19931	No	Storage	-	-	Active
STORAGE TANK 004 - 1,000,000	19932	No	Storage	-	-	Active
STORAGE TANK 008 - 1,000,000	25860	No	Storage	-	-	Active
XSTORAGE TANK 005 - 75,000	19933	No	Storage	-	-	Inactive
XSTORAGE TANK 006 - 125,000	19934	No	Storage	-	-	Inactive
XSTORAGE TANK 007 - 25,000	19935	No	Storage	-	-	Inactive
TP003 - CL2	26581	No	Treatment Plant	-	-	Active
TP004 - CL2	26582	No	Treatment Plant	-	-	Active
TP001	879	No	Treatment Plant	-	-	Active
XTP002 - AS CL2	25349	No	Treatment Plant	-	-	Inactive
XTP005 - CL2	26583	No	Treatment Plant	-	-	Inactive

1 - 29 of 29

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
XTP002 - AS CL2	25349	Innovative	Inorganics removal
TP003 - CL2	26581	Hypochlorination, Pre	Disinfection
TP004 - CL2	26582	Hypochlorination, Pre	Disinfection
TP001	879	Filtration, Cartridge	Particulate removal
TP001	879	Gaseous Chlorination, Pre	Disinfection
TP001	879	Gaseous Chlorination, Post	Disinfection
TP001	879	Coagulation	Particulate removal
TP001	879	Sedimentation	Particulate removal

1 - 8 of 8

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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