Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0410112
PWS Name	TUCSON CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	732906
County Served	Pima

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, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	206390	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	206391	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	206409	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	206408	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	206407	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	206406	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	206405	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	206404	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	206403	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	206402	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	206401	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	206400	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	206399	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	206398	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	206397	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	206396	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	206395	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	206394	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	206393	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	206392	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	206415	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	206414	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	206413	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	206412	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	206411	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	206410	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	206388	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	206384	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	206385	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	206389	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	206387	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	206386	Returned to Compliance	01-JAN-2022	31-DEC-2024	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	206186	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	206176	Returned to Compliance	01-MAY-2019	31-JUL-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	206175	Returned to Compliance	01-MAY-2019	31-JUL-2019	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	206284	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	206245	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	206244	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	206189	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	206192	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	206282	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	206243	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	206281	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	206242	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	206280	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	206241	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	206240	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	206279	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	206278	Returned to Compliance	01-JAN-2019	31-DEC-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	206239	Returned to Compliance	01-JAN-2019	31-DEC-2021	No

1 - 50 of 2,075

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
209	206387	SIF	State Public Notification received	12-AUG-2025	State	-
210	206385	SIF	State Public Notification received	12-AUG-2025	State	-
211	206388	SIF	State Public Notification received	12-AUG-2025	State	-
207	206386	SIF	State Public Notification received	11-AUG-2025	State	-
206	206384	SIF	State Public Notification received	11-AUG-2025	State	-
208	206389	SIF	State Public Notification received	11-AUG-2025	State	-
172	206186	SIF	State Public Notification received	01-JUL-2022	State	-
149	206245	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206246	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206247	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206248	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206256	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206257	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
149	206258	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
154	206259	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
157	206260	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
162	206261	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206262	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206263	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206264	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206265	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206266	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206267	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206268	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206269	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206270	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206271	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206272	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206273	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206274	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206275	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206276	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206277	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206278	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206279	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206280	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206281	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206282	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206283	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206284	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206285	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206286	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206287	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206295	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206296	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
160	206297	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
167	206299	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
134	206179	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
136	206180	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-
132	206181	SIA	State Violation/Reminder Notice	14-FEB-2022	State	-

1 - 50 of 2,022

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC001 - 10092	21431	Yes	Consecutive Connection	Ground water	Emergency	Active
XWL-55-620189 - B-019A	8167	Yes	Well	Ground water	Seasonal	Inactive
XWL-55-620017 - C-015A	6676	Yes	Well	Ground water	Seasonal	Inactive
WL-55-620112 - E-014 A	8164	Yes	Well	Ground water	Seasonal	Active
WL-55-620069 - D-035 A	8162	Yes	Well	Ground water	Seasonal	Active
WL-55-559217 - C-124A	7337	Yes	Well	Ground water	Seasonal	Active
WL-55-620236 - B-051B	6678	Yes	Well	Ground water	Seasonal	Active
WL-55-620106 - E-008A	6675	Yes	Well	Ground water	Seasonal	Active
WL-55-620113 - E-015 A	4524	Yes	Well	Ground water	Seasonal	Active
WL-55-620072 - D-037 B	4510	Yes	Well	Ground water	Seasonal	Active
WL-55-620061 - D-023 A	4498	Yes	Well	Ground water	Seasonal	Active
WL-55-626407 - C-115 A	4495	Yes	Well	Ground water	Seasonal	Active
WL-55-619975 - C-085 A	4405	Yes	Well	Ground water	Seasonal	Active
WL-55-620126 - B-056 A	4369	Yes	Well	Ground water	Seasonal	Active
XWL-55-628077 - G-006A	8393	Yes	Well	Ground water	Permanent	Inactive
XWL-55-582687 - SS-023B	8300	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620308 - A-035 A	8235	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620239 - B-054B	8174	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620279 - AV-019A	8170	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620125 - B-055 A	8166	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620057 - D-018 A	8161	Yes	Well	Ground water	Permanent	Inactive
XWL-55-619925 - SS-018 A	8159	Yes	Well	Ground water	Permanent	Inactive
XWL-55-619900 - SC-026A	8158	Yes	Well	Ground water	Permanent	Inactive
XWL-55-619853 - Z-017A	8157	Yes	Well	Ground water	Permanent	Inactive
XWL-55-619839 - Z-002A	8156	Yes	Well	Ground water	Permanent	Inactive
XWL-55-575450 - CA-003A	7791	Yes	Well	Ground water	Permanent	Inactive
XWL-55-567973	7645	Yes	Well	Ground water	Permanent	Inactive
XWL-55-573207 - G-008A	7604	Yes	Well	Ground water	Permanent	Inactive
XWL-55-570367 - F-008A	7601	Yes	Well	Ground water	Permanent	Inactive
XWL-55-619973 - C-083A	7595	Yes	Well	Ground water	Permanent	Inactive
XWL-55-565170 - C-0126A	7491	Yes	Well	Ground water	Permanent	Inactive
XWL-55-558091 - C-008B	7338	Yes	Well	Ground water	Permanent	Inactive
WL-55-559218 - G-004A	7332	Yes	Well	Ground water	Permanent	Inactive
XWL-55-555780 - D-066A	7329	Yes	Well	Ground water	Permanent	Inactive
XWL-55-085358 - C-110A	7274	Yes	Well	Ground water	Permanent	Inactive
XWL-55-626406 - C-109A	7273	Yes	Well	Ground water	Permanent	Inactive
XWL-55-626410 - C-108A	7272	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620040 - C-037A	7271	Yes	Well	Ground water	Permanent	Inactive
XWL-55-530990 - AV-014A	7267	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620170 - AV-024 A	7180	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620169 - AV-023 A	7179	Yes	Well	Ground water	Permanent	Inactive
XWL-55-620272 - AV-013A	7178	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533859 - R-009A	7176	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533858 - R-008A	7175	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533857 - R-007A	7174	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533856 - R-006A	7173	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533855 - R-005A	7172	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533854 - R-004A	7171	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533853 - R-003A	7170	Yes	Well	Ground water	Permanent	Inactive
XWL-55-533852 - R-002A	7169	Yes	Well	Ground water	Permanent	Inactive

1 - 50 of 782

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
XTP001 - CL2	1147	Hypochlorination, Pre	Disinfection
XTP002 - CL2	15862	Hypochlorination, Post	Disinfection
XTP003 - CL2	15863	Hypochlorination, Post	Disinfection
XTP004 - CL2	15960	Hypochlorination, Post	Disinfection
XTP126 - CL2, TCE	21838	Activated Carbon, Granular	Disinfection by-products control
XTP126 - CL2, TCE	21838	Aeration, Packed Tower	Disinfection by-products control
XTP126 - CL2, TCE	21838	Hypochlorination, Post	Disinfection
XTP126 - CL2, TCE	21838	Sedimentation	Particulate removal
XTP164 - CL2	22338	Hypochlorination, Pre	Organics removal
XTP164 - CL2	22338	Hypochlorination, Post	Disinfection
TP005 - CL2	23894	Chlorination (FRDS-1.5)	Disinfection
TP006 - CL2	23895	Chlorination (FRDS-1.5)	Disinfection
TP007 - CL2	23896	Chlorination (FRDS-1.5)	Disinfection
TP012 - CL2	23900	Hypochlorination, Post	Disinfection
TP013 - CL2	23901	Hypochlorination, Post	Disinfection
TP014 - CL2	23902	Hypochlorination, Post	Disinfection
TP015 - CL2	23903	Hypochlorination, Post	Disinfection
TP016 - CL2	23904	Hypochlorination, Post	Disinfection
TP017 - CL2	23905	Hypochlorination, Post	Disinfection
TP018 - CL2	23906	Hypochlorination, Post	Disinfection
TP019 - CL2	23912	Chlorination (FRDS-1.5)	Disinfection
TP020 - CL2	23913	Chlorination (FRDS-1.5)	Disinfection
TP021 - CL2	23914	Chlorination (FRDS-1.5)	Disinfection
TP022 - CL2	23915	Chlorination (FRDS-1.5)	Disinfection
TP023 - CL2	23916	Chlorination (FRDS-1.5)	Disinfection
XTP024 - CL2	23917	Chlorination (FRDS-1.5)	Disinfection
TP025 - CL2	23918	Chlorination (FRDS-1.5)	Disinfection
TP026 - CL2	23919	Chlorination (FRDS-1.5)	Disinfection
TP027 - CL2	23920	Chlorination (FRDS-1.5)	Disinfection
XTP030 - CL2	23921	Chlorination (FRDS-1.5)	Disinfection
TP028 - CL2	23922	Reverse Osmosis	Disinfection by-products control
XTP029 - CL2	23923	Reverse Osmosis	Disinfection by-products control
TP031 - CL2	23924	Reverse Osmosis	Disinfection by-products control
TP032 - CL2	23930	Chlorination (FRDS-1.5)	Disinfection
TP033 - CL2	23931	Chlorination (FRDS-1.5)	Disinfection
TP034 - CL2	23932	Chlorination (FRDS-1.5)	Disinfection
TP035 - CL2	23933	Chlorination (FRDS-1.5)	Disinfection
TP036 - CL2	23934	Chlorination (FRDS-1.5)	Disinfection
TP037 - CL2	23935	Chlorination (FRDS-1.5)	Disinfection
TP038 - CL2	23936	Chlorination (FRDS-1.5)	Disinfection
TP039 - CL2	23937	Chlorination (FRDS-1.5)	Disinfection
TP040 - CL2	23940	Chlorination (FRDS-1.5)	Disinfection
TP041 - CL2	23941	Chlorination (FRDS-1.5)	Disinfection
TP042 - CL2	23942	Chlorination (FRDS-1.5)	Disinfection
TP043 - CL2	23950	Chlorination (FRDS-1.5)	Disinfection
TP044 - CL2	23951	Chlorination (FRDS-1.5)	Disinfection
TP045 - CL2	23954	Chlorination (FRDS-1.5)	Disinfection
TP046 - CL2	23966	Chlorination (FRDS-1.5)	Disinfection
TP047 - CL2	23967	Chlorination (FRDS-1.5)	Disinfection
TP048 - CL2	23968	Chlorination (FRDS-1.5)	Disinfection

1 - 50 of 215

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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