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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCO0116001
PWS NameDENVER WATER BOARD
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served1287000
County ServedDenver

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, Turbidity (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule1290Returned to Compliance01-MAR-202431-MAR-2024No
MRMonitoring, RegularRadionuclides and Revised Rad RuleCombined Uranium1289Returned to Compliance01-JAN-202431-MAR-2024No
MRMonitoring, RegularSynthetic Organic ChemicalsBHC-GAMMA1403Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsMethoxychlor1404Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsToxaphene1405Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDalapon1406Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDiquat1407Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsEndothall1408Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) adipate1409Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsOXAMYL1410Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsSimazine1411Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) phthalate1412Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPicloram1413Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDinoseb1414Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHexachlorocyclopentadiene1415Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsEndrin1402Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE1431Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAldicarb sulfoxide1416Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE1430Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAldicarb sulfone1417Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsCarbofuran1418Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAldicarb1419Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAtrazine1420Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsLASSO1421Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor1422Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor epoxide1423Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsTotal Polychlorinated Biphenyls (PCB)1429Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4-D1424Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4,5-TP1425Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHEXACHLOROBENZENE1426Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsBenzo(a)pyrene1427Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPentachlorophenol1428Known01-JAN-202331-DEC-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane1432Known01-JAN-202331-DEC-2025No
MRMonitoring, Turbidity (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule1272Returned to Compliance01-SEP-202230-SEP-2022No
MRMonitoring, Turbidity (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule1217Returned to Compliance01-MAY-201931-MAY-2019No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE1133Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE1132Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE1163Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE1101Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane1165Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane1103Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane1134Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE1102Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE1164Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsEndrin1104Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsEndrin1135Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsEndrin1073Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsBHC-GAMMA1105Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsBHC-GAMMA1074Returned to Compliance01-JAN-201431-DEC-2016No
MRMonitoring, RegularSynthetic Organic ChemicalsBHC-GAMMA1136Returned to Compliance01-JAN-201431-DEC-2016No
  • 1 - 50 of 156

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
411402SIEState Public Notification requested10-FEB-2026State -
411403SIEState Public Notification requested10-FEB-2026State -
411432SIEState Public Notification requested10-FEB-2026State -
411431SIEState Public Notification requested10-FEB-2026State -
411430SIEState Public Notification requested10-FEB-2026State -
411404SIEState Public Notification requested10-FEB-2026State -
411405SIEState Public Notification requested10-FEB-2026State -
411406SIEState Public Notification requested10-FEB-2026State -
411407SIEState Public Notification requested10-FEB-2026State -
411408SIEState Public Notification requested10-FEB-2026State -
411409SIEState Public Notification requested10-FEB-2026State -
411410SIEState Public Notification requested10-FEB-2026State -
411411SIEState Public Notification requested10-FEB-2026State -
411412SIEState Public Notification requested10-FEB-2026State -
411413SIEState Public Notification requested10-FEB-2026State -
411414SIEState Public Notification requested10-FEB-2026State -
411415SIEState Public Notification requested10-FEB-2026State -
411416SIEState Public Notification requested10-FEB-2026State -
411417SIEState Public Notification requested10-FEB-2026State -
411418SIEState Public Notification requested10-FEB-2026State -
411419SIEState Public Notification requested10-FEB-2026State -
411420SIEState Public Notification requested10-FEB-2026State -
411421SIEState Public Notification requested10-FEB-2026State -
411422SIEState Public Notification requested10-FEB-2026State -
411423SIEState Public Notification requested10-FEB-2026State -
411424SIEState Public Notification requested10-FEB-2026State -
411425SIEState Public Notification requested10-FEB-2026State -
411426SIEState Public Notification requested10-FEB-2026State -
411427SIEState Public Notification requested10-FEB-2026State -
411428SIEState Public Notification requested10-FEB-2026State -
411429SIEState Public Notification requested10-FEB-2026State -
391289SOXState Compliance achieved06-AUG-2024StateRTC sample
381290SOXState Compliance achieved08-MAY-2024State -
331272SOXState Compliance achieved08-NOV-2022State -
211217SIFState Public Notification received12-JUN-2020State -
111073SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111074SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111075SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111076SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111077SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111078SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111079SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111080SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111081SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111082SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111083SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111084SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111085SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111086SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
111087SOXState Compliance achieved22-FEB-2018StateRTC with next 3Y sampling completed and reported. ejc
  • 1 - 50 of 156

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
MARSTON FOREBAY13620YesIntakeSurface waterPermanentActive
S PLATTE DIVERSION CONDUIT 20161YesIntakeSurface waterPermanentActive
RALSTON RESERVOIR INTAKE160YesIntakeSurface waterPermanentActive
STRONTIA SPRINGS RES INTAKE159YesIntakeSurface waterPermanentActive
DISTRIBUTION SYSTEM6587NoDistribution System/Zone - - Active
LAKERIDGE PUMPSTATION16615NoPump Facility - - Active
LAMAR PUMPSTATION16616NoPump Facility - - Active
10TH AND HOOKER PUMPSTATION16617NoPump Facility - - Active
COMBINED RAW SOURCE13991NoSampling Station - - Active
COMBINED RAW SOURCE13992NoSampling Station - - Active
COMBINED RAW SOURCE13993NoSampling Station - - Active
COMBINED RAW SOURCE24672NoSampling Station - - Active
NORTHWATER DISINFECTION CONTACT PIPE24673NoSampling Station - - Active
NORTHWATER WTP SAMPLE STATION24678NoSampling Station - - Active
KENDRICK RESERVIOR16613NoStorage - - Active
GREEN MOUNTAIN RESERVOIR16614NoStorage - - Active
HIGHLANDS RESERVOIR 119345NoStorage - - Active
LONETREE RESERVOIR 119346NoStorage - - Active
CAPITOL HILL RESERVOIR 119348NoStorage - - Active
ASHLAND RESERVOIR 121765NoStorage - - Active
ASHLAND RESERVOIR 221766NoStorage - - Active
BELLEVIEW RESERVOIR21797NoStorage - - Active
BROOMFIELD RESERVOIR 121798NoStorage - - Active
BROOMFIELD RESERVOIR 221799NoStorage - - Active
CAPITOL HILL RESERVOIR 321803NoStorage - - Active
CHATFIELD RESERVOIR 121804NoStorage - - Active
CHATFIELD RESERVOIR 221805NoStorage - - Active
COLOROW RESERVOIR21806NoStorage - - Active
FOOTHILLS RESERVOIR 121807NoStorage - - Active
FOOTHILLS RESERVOIR 221808NoStorage - - Active
FOOTHILLS RESERVOIR 321809NoStorage - - Active
HIGHLANDS RESERVOIR 321810NoStorage - - Active
HOGBACK RESERVOIR21812NoStorage - - Active
LONE TREE RESERVOIR 221813NoStorage - - Active
MARSTON RESERVOIR 321814NoStorage - - Active
MARSTON RESERVOIR 421815NoStorage - - Active
MOFFAT 121816NoStorage - - Active
MOFFAT 221817NoStorage - - Active
MOFFAT 321818NoStorage - - Active
MOFFAT 421819NoStorage - - Active
56TH AVENUE RESERVOIR21820NoStorage - - Active
64TH AVENUE RESERVOIR21821NoStorage - - Active
HILLCREST RESERVOIR 123030NoStorage - - Active
HILLCREST RESERVOIR 223031NoStorage - - Active
HILLCREST RESERVOIR 323032NoStorage - - Active
MARSTON BACKWASH TANK 124143NoStorage - - Active
MARSTON BACKWASH TANK 224144NoStorage - - Active
MOFFAT BACKWASH TANK24145NoStorage - - Active
FOOTHILLS BACKWASH TANK24146NoStorage - - Active
FOOTHILLS DISINFECTION CONTACT BASIN24147NoStorage - - Active
  • 1 - 50 of 61

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
NORTHWATER WTP24671Ultraviolet RadiationDisinfection
NORTHWATER WTP24671Filtration, Rapid SandParticulate removal
NORTHWATER WTP24671SedimentationParticulate removal
NORTHWATER WTP24671FlocculationParticulate removal
NORTHWATER WTP24671Rapid MixParticulate removal
NORTHWATER WTP24671PermanganateManganese removal
NORTHWATER WTP24671InnovativeCorrosion control
NORTHWATER WTP24671InnovativeCorrosion control
NORTHWATER WTP24671CoagulationParticulate removal
NORTHWATER WTP24671Sludge TreatmentParticulate removal
NORTHWATER WTP24671InnovativeDisinfection
NORTHWATER WTP24671Hypochlorination, PostDisinfection
NORTHWATER WTP24671FluoridationOther
NORTHWATER WTP24671InnovativeCorrosion control
NORTHWATER WTP24671ChloraminesDisinfection
PH ADJUSTMENT STATION BOOSTER24674pH Adjustment, PostCorrosion control
MARSTON WTP3554InnovativeDisinfection
MARSTON WTP3554InnovativeCorrosion control
MARSTON WTP3554pH Adjustment, PostCorrosion control
MARSTON WTP3554ChloraminesDisinfection
MARSTON WTP3554Filtration, Rapid SandParticulate removal
MARSTON WTP3554CoagulationParticulate removal
MARSTON WTP3554PermanganateIron removal
MARSTON WTP3554Gaseous Chlorination, PreDisinfection
MARSTON WTP3554FluoridationOther
MARSTON WTP3554Activated Carbon, PowderedTaste / odor control
MARSTON WTP3554SedimentationParticulate removal
MARSTON WTP3554Rapid MixParticulate removal
MARSTON WTP3554FlocculationParticulate removal
MARSTON WTP3554Gaseous Chlorination, PostDisinfection
MARSTON WTP3554pH Adjustment, PreDisinfection by-products control
MOFFAT WTP3555InnovativeDisinfection
MOFFAT WTP3555InnovativeCorrosion control
MOFFAT WTP3555SedimentationParticulate removal
MOFFAT WTP3555Rapid MixParticulate removal
MOFFAT WTP3555FlocculationParticulate removal
MOFFAT WTP3555Filtration, Rapid SandParticulate removal
MOFFAT WTP3555CoagulationParticulate removal
MOFFAT WTP3555FluoridationOther
MOFFAT WTP3555Gaseous Chlorination, PostDisinfection
MOFFAT WTP3555Gaseous Chlorination, PreDisinfection
MOFFAT WTP3555ChloraminesDisinfection
MOFFAT WTP3555pH Adjustment, PostCorrosion control
MOFFAT WTP3555pH Adjustment, PreDisinfection by-products control
MOFFAT WTP3555PermanganateIron removal
FOOTHILLS WTP3556InnovativeDisinfection
FOOTHILLS WTP3556InnovativeCorrosion control
FOOTHILLS WTP3556SedimentationParticulate removal
FOOTHILLS WTP3556Rapid MixParticulate removal
FOOTHILLS WTP3556FlocculationParticulate removal
  • 1 - 50 of 59
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.