Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	090400035
PWS Name	San Xavier West
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	1511
County Served

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	Arsenic Rule	Arsenic	0400035031005112025	Returned to Compliance	01-NOV-2025	30-NOV-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400035031005102025	Returned to Compliance	01-OCT-2025	31-OCT-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040003503100582025	Returned to Compliance	01-AUG-2025	31-AUG-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	0400035031005112024	Returned to Compliance	01-NOV-2024	30-NOV-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	040003527295012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040003527245612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	0400035034010102019	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040003503104012006	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040003503104012005	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040003522310092004	Returned to Compliance	01-SEP-2004	30-SEP-2004	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	040003503203512004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	040003503295912004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	040003503294612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	040003503109412004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	040003503200512004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	040003503201012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	040003503201512004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	040003503202012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	040003503203112004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	040003503203212004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	040003503203312004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	040003503203412004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	040003503293112004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	040003503203612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	040003503203712004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	040003503203912004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	040003503204012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	040003503204112004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	040003503204212004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	040003503204612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	040003503205012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	040003503205112004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	040003503206312004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	040003503206512004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	040003503206712004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	040003503238312004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	040003503210512004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	040003503211012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040003503104012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	040003503227412004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	040003503230612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	040003503232612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040003527295012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	040003521310052001	Returned to Compliance	01-MAY-2001	31-MAY-2001	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040003522310052001	Returned to Compliance	01-MAY-2001	31-MAY-2001	Yes

1 - 45 of 45

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
0400035OX12292512396	0400035031005102025	EOX	Federal Compliance achieved	29-DEC-2025	Region	Subsequent reporting of required results.
0400035OX12292512396	0400035031005112025	EOX	Federal Compliance achieved	29-DEC-2025	Region	Subsequent reporting of required results.
0400035OX09292512396	040003503100582025	EOX	Federal Compliance achieved	29-SEP-2025	Region	Subsequent reporting of required results.
0400035IA04032512084	0400035031005112024	EIA	Federal Violation/Reminder Notice	03-APR-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400035OX02132097188	0400035034010102019	EOX	Federal Compliance achieved	13-FEB-2020	Region	Subsequent reporting of required results.
0400035OX01261045913	040003503204012004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045917	040003503295912004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045918	040003503294612004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045920	040003503293112004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045919	040003503238312004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045916	040003503232612004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045921	040003503230612004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045911	040003503227412004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045898	040003503200512004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045897	040003503201012004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045895	040003503201512004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045900	040003503202012004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045901	040003503203112004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045894	040003503203212004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045892	040003503203312004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045896	040003503203412004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045899	040003503203512004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045902	040003503203612004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045893	040003503203712004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045903	040003503203912004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045909	040003503204112004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045904	040003503204212004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045905	040003503204612004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045915	040003503205012004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045906	040003503205112004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045914	040003503206312004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045908	040003503206512004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045907	040003503206712004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045912	040003503210512004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX01261045910	040003503211012004	EOX	Federal Compliance achieved	26-JAN-2010	Region	-
0400035OX08110940130	040003503104012006	EOX	Federal Compliance achieved	11-AUG-2009	Region	-
0400035OX08150618103	040003522310092004	EOX	Federal Compliance achieved	15-AUG-2006	Region	-
0400035OX08150618102	040003503104012005	EOX	Federal Compliance achieved	15-AUG-2006	Region	Sampled in 2005. However, data received in May 2006.
0400035OX08150618104	040003503109412004	EOX	Federal Compliance achieved	15-AUG-2006	Region	Sampled in 2002. However, data received in May 2006.
0400035OX08150618101	040003503104012004	EOX	Federal Compliance achieved	15-AUG-2006	Region	Sampled in 2005.
0400035OX08100617866	040003527295012004	EOX	Federal Compliance achieved	10-AUG-2006	Region	Correct number of samples collected in 2005, as well as analyses for both TTHMs and HAA5s.
0400035OX08020510839	040003521310052001	EOX	Federal Compliance achieved	02-AUG-2005	Region	-
0400035OX08020510838	040003522310052001	EOX	Federal Compliance achieved	02-AUG-2005	Region	-

1 - 43 of 43

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
groundwater purchased from city of tucson	0400035GW010	Yes	Consecutive Connection	Ground water	Emergency	Active
Well 7	0400035GW007	Yes	Well	Ground water	Permanent	Active
Well 6	0400035GW006	Yes	Well	Ground water	Permanent	Active
Well 5	0400035GW005	Yes	Well	Ground water	Emergency	Inactive
Well 1	0400035GW004	Yes	Well	Ground water	Emergency	Inactive
Well 2	0400035GW003	Yes	Well	Ground water	Emergency	Inactive
Well 4	0400035GW002	Yes	Well	Ground water	Emergency	Inactive
Well 3	0400035GW001	Yes	Well	Ground water	Emergency	Inactive
Entry Point to distribution - After Well 6	0400035EP003	No	Common Headers	-	-	Active
Entry Point to Distribution - After Well 7	0400035EP004	No	Common Headers	-	-	Active
Entry Point to distribution system	0400035EP001	No	Common Headers	-	-	Inactive
entry point from city of tucson water	0400035EP002	No	Common Headers	-	-	Inactive
Distribution system	0400035DS001	No	Distribution System/Zone	-	-	Active
Storage Tank 1	0400035ST001	No	Storage	-	-	Active
Storage Tank 2	0400035ST002	No	Storage	-	-	Active
Treatment Plant - chlorination	0400035TP004	No	Treatment Plant	-	-	Active
Treatment Plant for Well 7	0400035TP005	No	Treatment Plant	-	-	Active
Chlorination Unit for Well 3	0400035TP001	No	Treatment Plant	-	-	Inactive
Chlorination Unit for Well 4	0400035TP002	No	Treatment Plant	-	-	Inactive
Chlorination Unit for Well 5	0400035TP003	No	Treatment Plant	-	-	Inactive

1 - 20 of 20

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Chlorination Unit for Well 3	0400035TP001	Hypochlorination, Post	Disinfection
Chlorination Unit for Well 4	0400035TP002	Hypochlorination, Post	Disinfection
Treatment Plant - chlorination	0400035TP004	Chlorination (FRDS-1.5)	Disinfection
Treatment Plant for Well 7	0400035TP005	Chlorination (FRDS-1.5)	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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