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PWS IDNN0403000
PWS NameFort Defiance-Window Rock-St Michaels NTUA
PWS TypeCommunity water system
Owner TypeTribal Government
Primary SourceGround water
Primacy TypeTribal
Is Wholesaler?Yes
Population Served12869
County Served

Note


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.

PWS Violation


Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice040300075750022025Open01-FEB-2025 - No
TTTreatment Technique, Level 1 Assessment (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule04030002A800022025Open01-FEB-2025 - Yes
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)040300030245672018Returned to Compliance01-JUL-201830-SEP-2018No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300030295072018Returned to Compliance01-JUL-201830-SEP-2018No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300030295042018Returned to Compliance01-APR-201830-JUN-2018No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)040300030245642018Returned to Compliance01-APR-201830-JUN-2018No
MRMonitoring, RegularNitrate RuleNitrite040300003104112018Returned to Compliance01-JAN-201831-DEC-2018No
MRMonitoring, RegularNitrate RuleNitrate040300003104012018Returned to Compliance01-JAN-201831-DEC-2018No
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295012017Returned to Compliance01-JAN-201731-MAR-2017Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice040300075750012017Returned to Compliance01-JAN-2017 - No
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM0403000022950102016Returned to Compliance01-OCT-201631-DEC-2016Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295072016Returned to Compliance01-JUL-201630-SEP-2016Yes
OtherSample Siting Plan Errors (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule04030005A800042016Returned to Compliance01-APR-2016 - No
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295042016Returned to Compliance01-APR-201630-JUN-2016Yes
MRMonitoring, Routine Minor (TCR)Total Coliform RuleColiform (TCR)040300024310022016Returned to Compliance01-FEB-201629-FEB-2016No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)040300030245612016Returned to Compliance01-JAN-201631-MAR-2016No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300030295012016Returned to Compliance01-JAN-201631-MAR-2016No
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295012016Returned to Compliance01-JAN-201631-MAR-2016Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM0403000022950102015Returned to Compliance01-OCT-201531-DEC-2015Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice0403000757500102015Returned to Compliance01-OCT-2015 - No
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295072015Returned to Compliance01-JUL-201530-SEP-2015Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice040300075750072015Returned to Compliance01-JUL-2015 - No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300030295072015Returned to Compliance01-JUL-201530-SEP-2015No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)040300030245672015Returned to Compliance01-JUL-201530-SEP-2015No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)040300030245642015Returned to Compliance01-APR-201530-JUN-2015No
MRMonitoring, Routine (IDSE)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300030295042015Returned to Compliance01-APR-201530-JUN-2015No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)040300022310072014Returned to Compliance01-JUL-201431-JUL-2014Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM040300002295072013Returned to Compliance01-JUL-201330-SEP-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium040300002400672013Returned to Compliance01-JUL-201330-SEP-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium040300002400642013Returned to Compliance01-APR-201330-JUN-2013Yes
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium040300002400612013Returned to Compliance01-JAN-201331-MAR-2013Yes
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)0403000233100122012Returned to Compliance01-DEC-201231-DEC-2012No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)0403000233100112012Returned to Compliance01-NOV-201230-NOV-2012No
MRMonitoring, Routine Minor (TCR)Total Coliform RuleColiform (TCR)0403000243100102012Returned to Compliance01-OCT-201231-OCT-2012No
MCLMaximum Contaminant Level Violation, AverageRadionuclides and Revised Rad RuleCombined Uranium0403000024006102012Returned to Compliance01-OCT-201231-DEC-2012Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)040300022310082011Returned to Compliance01-AUG-201131-AUG-2011Yes
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE040300003294612011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE040300003293112011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsStyrene040300003299612011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsEthylbenzene040300003299212011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsToluene040300003299112011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsBenzene040300003299012011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsCHLOROBENZENE040300003298912011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsTetrachloroethylene040300003298712011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic Chemicals1,1,2-Trichloroethane040300003298512011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsTrichloroethylene040300003298412011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloropropane040300003298312011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride040300003298212011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane040300003298112011Returned to Compliance01-JAN-201131-DEC-2013No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane040300003298012011Returned to Compliance01-JAN-201131-DEC-2013No
  • 1 - 50 of 156

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
0403000FJ12052543012040300075750022025SFJState Formal Notice of Violation issued05-DEC-2025StateNOV issued for failure to prepare and post a public notice relating to failure to prepare and submit a Level 1 Assessment during February 2025.
0403000OX0930254292804030005A800042016SOXState Compliance achieved30-SEP-2025StateRTCR Sample Site Plan received and approved.
0403000FJ0626254259404030002A800022025SFJState Formal Notice of Violation issued26-JUN-2025StateNOV, PN required.
0403000OX02141936795040300003104112018SOXState Compliance achieved14-FEB-2019StateBuell Park 1 and 2 were confirmed as being offline.
0403000OX02141936794040300003104012018SOXState Compliance achieved14-FEB-2019StateBuell Park 1 and 2 were confirmed as being offline.
0403000OX12181836559040300030245642018SOXState Compliance achieved18-DEC-2018StateRTC, system will be sampled on a quarterly basis. PWSSP met with NTUA Laboratory staff to discuss the need to continue with quarterly sampling.
0403000OX12181836797040300030245672018SOXState Compliance achieved18-DEC-2018StateRTC, quarterly sampling continues. NTUA submitted a sample result for Connie Roanhorse site on 12/18/18.
0403000OX12181836796040300030295072018SOXState Compliance achieved18-DEC-2018StateRTC, quarterly sampling continues. NTUA submitted a sample result for Connie Roanhorse site on 12/18/18.
0403000OX12181836558040300030295042018SOXState Compliance achieved18-DEC-2018StateRTC, system will be sampled on a quarterly basis. PWSSP met with NTUA Laboratory staff to discuss the need to continue with quarterly sampling.
0403000FJ06231733259040300002295012017SFJState Formal Notice of Violation issued23-JUN-2017StateNOV issued for TTHM MCL exceedance.
0403000OX05191733360040300075750012017SOXState Compliance achieved19-MAY-2017StateRTC, PN received.
0403000FJ030717330470403000022950102016SFJState Formal Notice of Violation issued07-MAR-2017StateNOV issued for an MCL exceedance of TTHMs.
0403000OX020617332110403000022950102015SOXState Compliance achieved06-FEB-2017StateRTC, RAA is below the MCL for Trihalomethanes.
0403000OX02061733213040300002295072016SOXState Compliance achieved06-FEB-2017StateRTC, RAA is below the MCL for Trihalomethanes.
0403000OX02061733212040300002295042016SOXState Compliance achieved06-FEB-2017StateRTC, RAA is below the MCL for Trihalomethanes.
0403000OX11181632728040300002295012016SOXState Compliance achieved18-NOV-2016StateRTC, PN received.
0403000OX07011632666040300075750072015SOXState Compliance achieved01-JUL-2016StateRTC, PN in the 2015 CCR addressed Stage 2 DBPs.
0403000OX070116326670403000757500102015SOXState Compliance achieved01-JUL-2016StateRTC, PN in the 2015 CCR, addressed Stage 2 DBPs.
0403000FJ05311632228040300030295012016SFJState Formal Notice of Violation issued31-MAY-2016StateNOV issued for a MCL exceedance and failure to collect a DBP quarterly sample. PN required.
0403000FJ05311632229040300030245612016SFJState Formal Notice of Violation issued31-MAY-2016StateNOV issued for a MCL exceedance and failure to collect a DBP quarterly sample. PN required.
0403000OX03071632190040300024310022016SOXState Compliance achieved07-MAR-2016StateRTC, PN received.
0403000FJ12021531411040300002295072015SFJState Formal Notice of Violation issued02-DEC-2015StateNOV for exceeding the TTHM MCL.
0403000FJ12021531414040300030245672015SFJState Formal Notice of Violation issued02-DEC-2015StateNOV issued for failure to collect a quarterly sample; Stage 2 DBPs at a specific site.
0403000FJ12021531413040300030295072015SFJState Formal Notice of Violation issued02-DEC-2015StateNOV issued for failure to collect a quarterly sample; Stage 2 DBPs at a specific site.
0403000OX11171531691040300030295042015SOXState Compliance achieved17-NOV-2015StateRTC, sample results received for quarterly sampling requirements.
0403000OX11171531692040300030245642015SOXState Compliance achieved17-NOV-2015StateRTC, sample results received for quarterly sampling requirements.
0403000OX04061531698040300003238012011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531703040300003299612011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531700040300003299212011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531705040300003299112011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531701040300003298912011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531704040300003298712011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531699040300003298312011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531706040300003297912011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531697040300003297612011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531696040300003296912011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531702040300003296812011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531708040300003296412011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000OX04061531707040300003295512011SOXState Compliance achieved06-APR-2015StateRTC, sample results received.
0403000FJ11171429345040300022310072014SFJState Formal Notice of Violation issued17-NOV-2014StateNOV issued for a MCL violation of bactee.
0403000OX05081428153040300002295072013SOXState Compliance achieved08-MAY-2014StateRTC, samples were collected on a quarterly basis. RAA is 0.0612 as of 10/2013.
0403000OX04011431784040300003293112011SOXState Compliance achieved01-APR-2014StateRTC, sample results received.
0403000OX04011431785040300003294612011SOXState Compliance achieved01-APR-2014StateRTC, sample results received.
0403000OX02281425209040300003298412011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425207040300003298212011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425211040300003297712011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425212040300003298112011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425206040300003299012011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425225040300003237812011SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
0403000OX02281425226040300002400642013SOXState Compliance achieved28-FEB-2014StateRTC, no longer subject to the rule. This entry point and associated wells have been inactivated.
  • 1 - 50 of 154

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
18K-301 (WINDOW ROCK 2)0403000GW002YesWell Ground waterOtherInactive
18T-517 (Coalmine G-7)0403000GW203YesWell Ground waterPermanentActive
18T-570 (Hunters Point 1)0403000GW201YesWell Ground waterPermanentActive
18T-574 (COALMINE G-5)0403000GW024YesWell Ground waterPermanentActive
18T-611 (BONITO CANYON 1)0403000GW023YesWell Ground waterPermanentActive
18T-613 (BONITO CANYON 3)0403000GW022YesWell Ground waterPermanentActive
18-0656 (Upper Coalmine F-1)0403000GW021YesWell Ground waterPermanentActive
18T-612 (BONITO CANYON 2)0403000GW019YesWell Ground waterPermanentActive
18T-606 (BLACK CREEK 2)0403000GW018YesWell Ground waterPermanentActive
18T-593 (BLACK CREEK 3)0403000GW017YesWell Ground waterPermanentActive
18T-597 (BLACK CREEK 4)0403000GW016YesWell Ground waterPermanentActive
18T-605 (BLACK CREEK 5)0403000GW015YesWell Ground waterPermanentActive
18K-327 (BONITO CANYON 4)0403000GW012YesWell Ground waterPermanentActive
18T-517 (Coalmine G-2)0403000GW008YesWell Ground waterPermanentActive
18T-551 (Coalmine G-4)0403000GW007YesWell Ground waterPermanentActive
18T-582 (SLICK ROCK A-1)0403000GW006YesWell Ground waterPermanentActive
18T-583 (SLICK ROCK A-2)0403000GW005YesWell Ground waterPermanentActive
18T-592 (BLACK CREEK 1)0403000GW001YesWell Ground waterPermanentActive
18-0672 (Hunters Point 2)0403000GW202YesWell Ground waterOtherInactive
18T-505 (Red Lake)0403000GW103YesWell Ground waterOtherInactive
18T-523A (Buell Park 1)0403000GW102YesWell Ground waterOtherInactive
18T-521A (Buell Park 2)0403000GW101YesWell Ground waterOtherInactive
18T-552A (COALMINE G-3)0403000GW020YesWell Ground waterOtherInactive
18-0655 (Upper Coalmine F-2)0403000GW014YesWell Ground waterOtherInactive
10T-242 (Chinle ?? )0403000GW013YesWell Ground waterOtherInactive
18-0654 (BONITO CANYON 5)0403000GW011YesWell Ground waterOtherInactive
18T-609 (WINDOW ROCK 3)0403000GW010YesWell Ground waterOtherInactive
18T-516 (Coalmine G-1)0403000GW009YesWell Ground waterOtherInactive
18T-577 (Upper Coalmine F-3)0403000GW004YesWell Ground waterOtherInactive
18A-174B (WINDOW ROCK 1)0403000GW003YesWell Ground waterOtherInactive
18T-592 Entry Point (Black Creek 1)0403000EP001NoCommon Headers - - Active
Slick Rock Entry Point (18T-583, 18T-582)0403000EP005NoCommon Headers - - Active
Coalmine G Entry Point (18T-551, -574, G-7)0403000EP007NoCommon Headers - - Active
Bonito Canyon Entry Point (18K-327, 18T-613)0403000EP012NoCommon Headers - - Active
Black Rock Entry Point (18T-605, -597, -593, -606)0403000EP015NoCommon Headers - - Active
Buell Park Entry Point (18T-521A, 18T-523A)0403000EP101NoCommon Headers - - Active
18T-570 Entry Point (Hunters Point 1)0403000EP201NoCommon Headers - - Active
WR BIA Entry Point (18K-301, 18A-174B, 18T-609)0403000EP002NoCommon Headers - - Inactive
18T-577 Entry Point (Upper Coalmine F-3)0403000EP004NoCommon Headers - - Inactive
18-0654 Entry Point (Bonito Canyon 5)0403000EP011NoCommon Headers - - Inactive
18T-505 Entry Point (Red Lake)0403000EP103NoCommon Headers - - Inactive
18-0672 Entry Point (Hunters Point 2)0403000EP202NoCommon Headers - - Inactive
NN0403000 NTUA FD/WR/SM/Navajo/HP distr sys0403000DS001NoDistribution System/Zone - - Active
Buell Park Booster Station0403000PF000NoPump Facility - - Active
BIA Booster Station0403000PF002NoPump Facility - - Active
G Booster Station0403000PF003NoPump Facility - - Active
AE Booster Station (New)0403000PF004NoPump Facility - - Active
F Upper Coalmine East Booster Station0403000PF005NoPump Facility - - Active
B: Window Rock #1 (South) Tank0403000ST001NoStorage - - Active
B: Window Rock #2 (Middle) Tank0403000ST002NoStorage - - Active
  • 1 - 50 of 83

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
18T-592 Treatment (Black Creek 1)0403000TP001Hypochlorination, PostDisinfection
Window Rock BIA Treatment (WR 1, WR 2, WR 3)0403000TP002Gaseous Chlorination, PostDisinfection
18T-577 Treatment (Upper Coalmine F-3)0403000TP004Hypochlorination, PostDisinfection
Slick Rock Treatment (18T-583, 18T-582)0403000TP005Gaseous Chlorination, PostDisinfection
Coalmine G Treatment (18T-551, 18T-574, 18T-517, 18T-516)0403000TP007Gaseous Chlorination, PostDisinfection
Coalmine G Treatment (18T-551, 18T-574, 18T-517, 18T-516)0403000TP007FluoridationOther
18-0654 Treatment (Bonito Canyon 5)0403000TP011Gaseous Chlorination, PostDisinfection
Bonito Canyon Treatment (18-0654, 18K-327, 18T-613)0403000TP012Gaseous Chlorination, PostDisinfection
Bonito Canyon Treatment (18-0654, 18K-327, 18T-613)0403000TP012FluoridationOther
Black Rock Treatment Plant (18T-605, -597, -593A,-606)0403000TP015Filtration, GreensandIron removal
Black Rock Treatment Plant (18T-605, -597, -593A,-606)0403000TP015Filtration, GreensandManganese removal
Black Rock Treatment Plant (18T-605, -597, -593A,-606)0403000TP015Gaseous Chlorination, PostDisinfection
Black Rock Treatment Plant (18T-605, -597, -593A,-606)0403000TP015FluoridationOther
Buell Park Treatment (18T-523A, 18T-521A)0403000TP101Gaseous Chlorination, PostDisinfection
Buell Park Treatment (18T-523A, 18T-521A)0403000TP101FluoridationOther
18T-505 Treatment (Red Lake)0403000TP103Gaseous Chlorination, PostDisinfection
18T-505 Treatment (Red Lake)0403000TP103FluoridationOther
18T-570 Treatment (Hunters Point 1)0403000TP201Gaseous Chlorination, PostDisinfection
18T-570 Treatment (Hunters Point 1)0403000TP201FluoridationOther
  • 1 - 19 of 19

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.