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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDAS9711948
PWS NameCentral ASG
PWS TypeCommunity water system
Owner TypeState or Territorial Government
Primary SourceSurface water
Primacy TypeTerritory
Is Wholesaler?Yes
Population Served45315
County ServedEastern District

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
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule9711948360200122025Known01-DEC-202531-DEC-2025No
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule9711948360200112025Known01-NOV-202530-NOV-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE9711948032946102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U9711948034000102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsStyrene9711948032996102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsEthylbenzene9711948032992102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsToluene9711948032991102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsBenzene9711948032990102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsCHLOROBENZENE9711948032989102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsTetrachloroethylene9711948032987102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicals1,1,2-Trichloroethane9711948032985102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsTrichloroethylene9711948032984102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloropropane9711948032983102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride9711948032982102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane9711948032981102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane9711948032980102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicalstrans-1,2-Dichloroethylene9711948032979102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsVinyl chloride9711948032976102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicalsp-Dichlorobenzene9711948032969102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicalso-Dichlorobenzene9711948032968102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsDICHLOROMETHANE9711948032964102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane9711948032959102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic ChemicalsXylenes, Total9711948032955102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicalscis-1,2-Dichloroethylene9711948032380102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularVolatile Organic Chemicals1,2,4-Trichlorobenzene9711948032378102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPentachlorophenol9711948032326102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsBenzo(a)pyrene9711948032306102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHEXACHLOROBENZENE9711948032274102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularNitrate RuleNitrite9711948031041102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularNitrate RuleNitrate9711948031040102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4,5-TP9711948032110102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4-D9711948032105102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsTotal Polychlorinated Biphenyls (PCB)9711948032383102025Known01-OCT-202531-DEC-2025No
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule9711948360200102025Known01-OCT-202531-OCT-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor epoxide9711948032067102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor9711948032065102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,3,7,8-TCDD9711948032063102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsLASSO9711948032051102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAtrazine9711948032050102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsCarbofuran9711948032046102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHexachlorocyclopentadiene9711948032042102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDinoseb9711948032041102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPicloram9711948032040102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) phthalate9711948032039102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsSimazine9711948032037102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsOXAMYL9711948032036102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) adipate9711948032035102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsGlyphosate9711948032034102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsEndothall9711948032033102025Known01-OCT-202531-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDiquat9711948032032102025Known01-OCT-202531-DEC-2025No
  • 1 - 50 of 633

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
9711948FJ112425203709711948360200112025SFJState Formal Notice of Violation issued24-NOV-2025StateSWTRs-NOV
9711948FJ112425203719711948360200122025SFJState Formal Notice of Violation issued24-NOV-2025StateSWTRs-NOV
9711948OX06112520336971194834301452025SOXState Compliance achieved11-JUN-2025State 5/19/2025 Laulii Elementary routine sample results were TC+/EC-. 5/21/2025 Repeat sample results were TC positive for the original and upstream locations. ASPA was notified of the TC+/EC- repeat sample results that triggered a level 2 assessment for the
9711948OX06112520337971194834301462025SOXState Compliance achieved11-JUN-2025StateSubsequent reporting of required results.
9711948OX06112520358971194875750052025SOXState Compliance achieved11-JUN-2025StateSubsequent reporting of required results.
9711948OX0522252033597119482B800052025SOXState Compliance achieved22-MAY-2025State 5/19/2025 Laulii Elementary routine sample results were TC+/EC-. 5/21/2025 Repeat sample results were TC positive for the original and upstream locations. ASPA was notified of the TC+/EC- repeat sample results that triggered a level 2 assessment for the
9711948OX09092420221971194834301462024SOXState Compliance achieved09-SEP-2024StateSubsequent monthly monitoring indicated the absence of coliforms.
9711948OX08272420222971194803401072024SOXState Compliance achieved27-AUG-2024StateSubsequent reporting of required results.
9711948OX06282419995971194803227412023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419973971194803299612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419996971194803299212023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419975971194803299112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420009971194803299012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419997971194803401012023SOXState Compliance achieved28-JUN-2024StateNext sample due 12/31/2024
9711948OX06282419980971194803104012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419979971194803104112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419993971194803200512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419981971194803201512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420002971194803203212023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419992971194803203312023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419994971194803203412023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419999971194803203512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419985971194803203612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419970971194803203712023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420000971194803203912023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419986971194803204012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420001971194803204112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419984971194803204212023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420007971194803204612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420006971194803205012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420005971194803205112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420003971194803206312023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419990971194803206512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419991971194803206712023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420008971194803210512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419983971194803232612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420017971194803237812023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420011971194803238012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419982971194803238312023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419998971194803293112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419989971194803294612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419977971194803295512023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420004971194803296412023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419988971194803296812023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419987971194803296912023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419972971194803297612023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420014971194803297712023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282419976971194803297912023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420013971194803298012023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
9711948OX06282420015971194803298112023SOXState Compliance achieved28-JUN-2024StateSubsequent reporting of required results.
  • 1 - 50 of 368

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
Utumoa Stream intake9711948SW001YesIntakeSurface waterOtherInactive
Lauli'i - Well 1979711948GW197YesWell Ground waterPermanentActive
Iliili - Well 259711948GW193YesWell Ground waterPermanentActive
Malaeloa - Well 159711948GW190YesWell Ground waterPermanentActive
Nuuuli - Well 1899711948GW189YesWell Ground waterPermanentActive
Malaeimi - Well #39711948GW188YesWell Ground waterPermanentActive
Malaeimi - Well #29711948GW187YesWell Ground waterPermanentActive
Malaeimi - Well #19711948GW186YesWell Ground waterPermanentActive
Pago Pago - Vaipito Well 1839711948GW183YesWell Ground waterPermanentActive
Fagali'i - Well 1829711948GW182YesWell Ground waterPermanentActive
Faga'alu - Well 1799711948GW179YesWell Ground waterPermanentActive
Pavaiai Well 1789711948GW178YesWell Ground waterPermanentActive
Pavaiai - Well 1779711948GW177YesWell Ground waterPermanentActive
Tafuna - Well 1729711948GW172YesWell Ground waterPermanentActive
Tafuna - Well 1719711948GW171YesWell Ground waterPermanentActive
Malaeloa - Well 1699711948GW169YesWell Ground waterPermanentActive
Malaeloa - Well 1689711948GW168YesWell Ground waterPermanentActive
Ili'ili - Well 1679711948GW167YesWell Ground waterPermanentActive
Pago Pago - Well 1659711948GW165YesWell Ground waterPermanentActive
Fagaitua - Well 1649711948GW164YesWell Ground waterPermanentActive
Pago Pago - Well 1639711948GW163YesWell Ground waterPermanentActive
Alao - Well 1619711948GW161YesWell Ground waterPermanentActive
Aasu - Well 1289711948GW128YesWell Ground waterPermanentActive
Lepuapua - Well 1199711948GW119YesWell Ground waterPermanentActive
Pago Pago - Well 1079711948GW107YesWell Ground waterPermanentActive
Pago Pago - Well 1059711948GW105YesWell Ground waterPermanentActive
Fagatogo - Well 1019711948GW101YesWell Ground waterPermanentActive
Aua - Well 999711948GW099YesWell Ground waterPermanentActive
Aua - Well 979711948GW097YesWell Ground waterPermanentActive
Malaeloa - Well 939711948GW093YesWell Ground waterPermanentActive
Malaeloa - Well 919711948GW091YesWell Ground waterPermanentActive
Faleniu - Well 859711948GW085YesWell Ground waterPermanentActive
Ili'ili - Well 849711948GW084YesWell Ground waterPermanentActive
Malaeloa - Well 839711948GW083YesWell Ground waterPermanentActive
Malaeloa - Well 709711948GW070YesWell Ground waterPermanentActive
Malaeimi - Well 679711948GW067YesWell Ground waterPermanentActive
Ili'ili - Well 629711948GW062YesWell Ground waterPermanentActive
Mapusaga - Well 299711948GW029YesWell Ground waterPermanentActive
Mapusaga - Well 289711948GW028YesWell Ground waterPermanentActive
Canco Hill - Well 279711948GW027YesWell Ground waterPermanentActive
Pago - Vaipito Well 239711948GW023YesWell Ground waterPermanentActive
Asili - Well 219711948GW021YesWell Ground waterPermanentActive
Tafuna - Well 209711948GW195YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 199711948GW194YesWell Ground water under the influence of surface waterPermanentActive
Mesepa - Well 69711948GW192YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 79711948GW191YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 819711948GW081YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 779711948GW077YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 729711948GW072YesWell Ground water under the influence of surface waterPermanentActive
Tafuna - Well 669711948GW066YesWell Ground water under the influence of surface waterPermanentActive
  • 1 - 50 of 314

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
Fagatogo SWTP9711948TP002Filtration, UltrafiltrationParticulate removal
Fagatogo SWTP9711948TP002Hypochlorination, PostDisinfection
Vaipito SWTP9711948TP003Filtration, CartridgeParticulate removal
Vaipito SWTP9711948TP003Filtration, UltrafiltrationParticulate removal
Vaipito SWTP9711948TP003Hypochlorination, PostDisinfection
Asili - Well 21 Treatment Plant9711948TP021Hypochlorination, PostDisinfection
Pago Pago - Vaipito Well 23 Treatment Plant9711948TP023Hypochlorination, PostDisinfection
Canco Hill - Well 27 Treatment Plant9711948TP027Hypochlorination, PostDisinfection
Mapusaga Well 28 Treatment Plant9711948TP028Hypochlorination, PostDisinfection
Mapusaga - Well 29 Treatment Plant9711948TP029Hypochlorination, PostDisinfection
Tafuna - Well 33 Treatment Plant9711948TP033Hypochlorination, PostDisinfection
Tafuna Well 60 Treatment Plant9711948TP060Hypochlorination, PostDisinfection
Tafuna - Well 61 Treatment Plant9711948TP061Hypochlorination, PostDisinfection
Ili'ili - Well 62 Treatment Plant9711948TP062Hypochlorination, PostDisinfection
Tafuna - Well 66 Treatment Plant9711948TP066Hypochlorination, PostDisinfection
Malaeimi - Well 67 Treatment Plant9711948TP067Hypochlorination, PostDisinfection
Malaeloa - Well 70 Treatment Plant9711948TP070Hypochlorination, PostDisinfection
Tafuna - Well 72 Treatment Plant9711948TP072Hypochlorination, PostDisinfection
Ili'ili - Well 76 Treatment Plant9711948TP076Hypochlorination, PostDisinfection
Tafuna - Well 77 Treatment Plant9711948TP077Hypochlorination, PostDisinfection
Malaeloa - Well 80 Treatment Plant9711948TP080Hypochlorination, PostDisinfection
Tafuna - Well 81 Treatment Plant9711948TP081Hypochlorination, PostDisinfection
Malaeloa - Well 83 Treatment Plant9711948TP083Hypochlorination, PostDisinfection
Ili'ili - Well 84 Treatment Plant9711948TP084Hypochlorination, PostDisinfection
Faleniu - Well 85 Treatment Plant9711948TP085Hypochlorination, PostDisinfection
Malaeimi - Well 89 Treatment Plant9711948TP089Hypochlorination, PostDisinfection
Malaeloa - Well 91 Treatment Plant9711948TP091Hypochlorination, PostDisinfection
Malaeloa - Well 93 Treatment Plant9711948TP093Hypochlorination, PostDisinfection
Aua - Well 97 Treatment Plant9711948TP097Hypochlorination, PostDisinfection
Aua - Well 99 Treatment Plant9711948TP099Hypochlorination, PostDe-chlorination
Fagatogo - Well 101 Treatment Plant9711948TP101Hypochlorination, PostDisinfection
Tula - Well 104 Treatment Plant9711948TP104Hypochlorination, PostDisinfection
Pago Pago - Well 105 Treatment Plant9711948TP105Hypochlorination, PostDisinfection
Pago Pago - Well 107 Treatment Plant9711948TP107Hypochlorination, PostDisinfection
Tula - Well 108 Treatment Plant9711948TP108Hypochlorination, PostDisinfection
Lepuapua - Well 119 Treatment Plant9711948TP119Hypochlorination, PostDisinfection
Faga'alu - Well 127 Treatment Plant9711948TP127Hypochlorination, PostDisinfection
Aasu - Well 128 Treatment Plant9711948TP128Hypochlorination, PostDisinfection
Aasu - Well 129 Treatment Plant9711948TP129Hypochlorination, PostDisinfection
Fagasa - Well 143 Treatment Plant9711948TP143Hypochlorination, PostDisinfection
Fagasa - Well 144 Treatment Plant9711948TP144Hypochlorination, PostDisinfection
Alao - Well 161 Treatment Plant9711948TP161Hypochlorination, PostDisinfection
Alao - Well 162 Treatment Plant9711948TP162Hypochlorination, PostDisinfection
Pago Pago - Well 163 Treatment Plant9711948TP163Hypochlorination, PostDisinfection
Fagaitua - Well 164 Treatment Plant9711948TP164Hypochlorination, PostDisinfection
Pago Pago - Well 165 Treatment Plant9711948TP165Hypochlorination, PostDisinfection
Ili'ili - Well 167 Treatment Plant9711948TP167Hypochlorination, PostDisinfection
Malaeloa - Well 168 Treatment Plant9711948TP168Hypochlorination, PostDisinfection
Malaeloa - Well 169 Treatment Plant9711948TP169Hypochlorination, PostDisinfection
Tafuna - Well 171 Treatment Plant9711948TP171Hypochlorination, PostDisinfection
  • 1 - 50 of 70
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.