Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0407101
PWS Name	TOLLESON CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	9300
County Served	Maricopa

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
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	6972	Open	02-OCT-2025	-	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	6970	Returned to Compliance	01-JUL-2025	31-JUL-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	6958	Returned to Compliance	01-JUL-2022	31-JUL-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	6953	Returned to Compliance	01-MAR-2018	31-MAY-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	6954	Returned to Compliance	01-MAR-2018	31-MAY-2018	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6929	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	6930	Returned to Compliance	01-JUL-2013	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	6928	Returned to Compliance	01-OCT-2011	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6950	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6924	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6923	Returned to Compliance	01-MAY-2008	31-MAY-2008	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6922	Returned to Compliance	01-MAR-2008	31-MAR-2008	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	6921	Returned to Compliance	01-JAN-2008	31-JAN-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	6915	Returned to Compliance	01-APR-2007	30-JUN-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	6914	Returned to Compliance	01-APR-2007	30-JUN-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6910	Returned to Compliance	01-JAN-2007	31-MAR-2007	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6907	Returned to Compliance	01-OCT-2006	31-OCT-2006	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6906	Returned to Compliance	01-MAR-2006	31-MAR-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6942	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6505	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	6105	Returned to Compliance	01-JUL-2005	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6405	Returned to Compliance	01-APR-2005	30-JUN-2005	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5405	Returned to Compliance	01-MAR-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	5505	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6938	Returned to Compliance	01-OCT-2004	31-DEC-2004	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	6005	Returned to Compliance	01-JUL-2004	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6936	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	2204	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6933	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	2104	Returned to Compliance	01-OCT-2003	31-DEC-2003	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	5905	Returned to Compliance	01-JUL-2003	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	2004	Returned to Compliance	01-JUL-2003	30-SEP-2003	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1903	Returned to Compliance	01-JAN-2003	31-MAR-2003	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1803	Returned to Compliance	01-OCT-2002	31-DEC-2002	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1703	Returned to Compliance	01-JUL-2002	30-SEP-2002	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	6925	Returned to Compliance	01-JUL-2002	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1602	Returned to Compliance	01-APR-2002	30-JUN-2002	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1502	Returned to Compliance	01-JAN-2002	31-MAR-2002	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1402	Returned to Compliance	01-OCT-2001	31-DEC-2001	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1302	Returned to Compliance	01-JUL-2001	30-SEP-2001	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	301	Returned to Compliance	01-APR-2001	30-JUN-2001	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1201	Returned to Compliance	01-APR-2001	30-JUN-2001	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1101	Returned to Compliance	01-JAN-2001	31-MAR-2001	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1001	Returned to Compliance	01-OCT-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	901	Returned to Compliance	01-JUL-2000	30-SEP-2000	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	5201	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	5101	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	800	Returned to Compliance	01-JAN-2000	31-MAR-2000	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	5301	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	5001	Returned to Compliance	01-JAN-2000	31-DEC-2000	No

1 - 50 of 111

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
135	6972	SIE	State Public Notification requested	07-NOV-2025	State	-
127	6970	SOX	State Compliance achieved	03-SEP-2025	State	-
103	6958	SOX	State Compliance achieved	27-APR-2023	State	Samples submitted late in SPetmeber per PWS submission and SDWIS CH16 04/27/2023
92	6954	SOX	State Compliance achieved	24-JUL-2018	State	-
92	6953	SOX	State Compliance achieved	24-JUL-2018	State	-
88	6929	SOX	State Compliance achieved	21-NOV-2013	State	-
90	6930	SOX	State Compliance achieved	09-JUL-2013	State	-
87	6928	SOX	State Compliance achieved	16-MAY-2012	State	-
91	6950	SOX	State Compliance achieved	21-DEC-2010	State	-
77	6924	SOX	State Compliance achieved	10-DEC-2009	State	-
85	2104	SOX	State Compliance achieved	06-MAR-2009	State	-
85	2004	SOX	State Compliance achieved	06-MAR-2009	State	-
85	2204	SOX	State Compliance achieved	06-MAR-2009	State	-
75	6923	SOX	State Compliance achieved	30-JUN-2008	State	-
73	6922	SOX	State Compliance achieved	08-MAY-2008	State	-
74	6921	SOX	State Compliance achieved	08-MAY-2008	State	-
71	6915	SOX	State Compliance achieved	29-AUG-2007	State	-
71	6914	SOX	State Compliance achieved	29-AUG-2007	State	-
70	6910	SOX	State Compliance achieved	23-JUL-2007	State	-
68	6906	SOX	State Compliance achieved	25-MAY-2007	State	-
1	6907	SOX	State Compliance achieved	19-DEC-2006	State	-
65	6942	SOX	State Compliance achieved	01-FEB-2006	State	-
64	6505	SOX	State Compliance achieved	16-NOV-2005	State	-
78	5405	SOX	State Compliance achieved	03-NOV-2005	State	-
60	5905	SOX	State Compliance achieved	31-OCT-2005	State	-
60	6005	SOX	State Compliance achieved	31-OCT-2005	State	-
60	6925	SOX	State Compliance achieved	31-OCT-2005	State	-
60	6105	SOX	State Compliance achieved	31-OCT-2005	State	-
56	6405	SOX	State Compliance achieved	22-AUG-2005	State	-
63	5505	SOX	State Compliance achieved	04-MAY-2005	State	-
62	6938	SOX	State Compliance achieved	23-FEB-2005	State	-
58	6936	SOX	State Compliance achieved	05-OCT-2004	State	-
57	6933	SOX	State Compliance achieved	07-MAY-2004	State	-
84	1703	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1602	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1502	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1402	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1302	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1903	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1101	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1001	SOX	State Compliance achieved	13-MAY-2003	State	-
84	901	SOX	State Compliance achieved	13-MAY-2003	State	-
81	301	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1803	SOX	State Compliance achieved	13-MAY-2003	State	-
84	1201	SOX	State Compliance achieved	13-MAY-2003	State	-
86	4701	SOX	State Compliance achieved	13-MAY-2000	State	-
86	4801	SOX	State Compliance achieved	13-MAY-2000	State	-
86	4901	SOX	State Compliance achieved	13-MAY-2000	State	-
86	5001	SOX	State Compliance achieved	13-MAY-2000	State	-
86	5101	SOX	State Compliance achieved	13-MAY-2000	State	-

1 - 50 of 83

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC001 - 07025	19365	Yes	Consecutive Connection	Surface water	Permanent	Active
XWL-55-504249 - 7	5216	Yes	Well	Ground water	Permanent	Inactive
XWL-55-518899 - 5	5215	Yes	Well	Ground water	Permanent	Inactive
XWL-55-519437 - 4	5214	Yes	Well	Ground water	Permanent	Inactive
XWL-55-609146 - 1	4301	Yes	Well	Ground water	Permanent	Inactive
XWL-55-609149 - 3	4297	Yes	Well	Ground water	Permanent	Inactive
WL-55-539196 - 8	7010	Yes	Well	Ground water	Permanent	Active
WL-55-209179 - 7	18740	Yes	Well	Ground water	Permanent	Active
XCC002 - 07025	19366	Yes	Consecutive Connection	Surface water	Permanent	Inactive
DISTRIBUTION SYSTEM	14600	No	Distribution System/Zone	-	-	Active
EPDS007	9360	No	Sampling Station	-	-	Active
EPDS008	9361	No	Sampling Station	-	-	Active
XEPDS004	16513	No	Sampling Station	-	-	Inactive
XEPDS001	16749	No	Sampling Station	-	-	Inactive
XEPDS005	16760	No	Sampling Station	-	-	Inactive
XEPDS003	16767	No	Sampling Station	-	-	Inactive
XEPHIS	17494	No	Sampling Station	-	-	Inactive
ST008 - 1,000,000	25944	No	Storage	-	-	Active
ST007 - 1,000,000	25945	No	Storage	-	-	Active
TP007 - CL2	15964	No	Treatment Plant	-	-	Active
TP008 - CL2	15965	No	Treatment Plant	-	-	Active
TP001 - SURFACE WATER	19367	No	Treatment Plant	-	-	Active
TP002 - SURFACE WATER	19368	No	Treatment Plant	-	-	Active

1 - 23 of 23

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP007 - CL2	15964	Hypochlorination, Post	Disinfection
TP008 - CL2	15965	Hypochlorination, Post	Disinfection
TP001 - SURFACE WATER	19367	Hypochlorination, Post	Disinfection
TP002 - SURFACE WATER	19368	Hypochlorination, Post	Disinfection

1 - 4 of 4

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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