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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDWI1110111
PWS NameRIO WATERWORKS
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served1095
County ServedColumbia

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
TTLSL InventoryLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS2500057Open17-OCT-2024 - Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice2500058Open17-OCT-2024 - No
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule2400042Returned to Compliance01-JAN-2024 - No
OtherNotification, StateGround Water RuleGroundwater Rule1800033Returned to Compliance13-SEP-2018 - No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM1500031Returned to Compliance01-JAN-201431-DEC-2014No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)1500032Returned to Compliance01-JAN-201431-DEC-2014No
MRMonitoring, RegularNitrate RuleNitrate1100021Returned to Compliance01-JUL-201030-SEP-2010No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U0900018Returned to Compliance01-JAN-200931-MAR-2009No
MRMonitoring, RegularRadionuclides and Revised Rad RuleRadium-2280900017Returned to Compliance01-JAN-200931-MAR-2009No
MRMonitoring, RegularRadionuclides and Revised Rad RuleRadium-2280900020Returned to Compliance01-JAN-200931-MAR-2009No
MRMonitoring, RegularRadionuclides and Revised Rad RuleCombined Radium (-226 and -228)0900019Returned to Compliance01-JAN-200931-MAR-2009No
MRMonitoring, RegularNitrate RuleNitrate0900010Returned to Compliance01-JUL-200830-SEP-2008No
MRMonitoring, RegularNitrate RuleNitrate0900011Returned to Compliance01-JUL-200830-SEP-2008No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleTTHM0900009Returned to Compliance01-JAN-200731-DEC-2008No
MRMonitoring, RegularNitrate RuleNitrate0100003Returned to Compliance01-JAN-200031-DEC-2000No
MRMonitoring, RegularNitrate RuleNitrate0100004Returned to Compliance01-JAN-200031-DEC-2000No
MRMonitoring, Routine Minor (TCR)Total Coliform RuleColiform (TCR)9700002Returned to Compliance01-SEP-199630-SEP-1996No
  • 1 - 17 of 17

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
99999000000000000012500057EIAFederal Violation/Reminder Notice18-JUN-2025ODSWeb -
24000542400042SOXState Compliance achieved23-JAN-2024State -
19000521800033SIAState Violation/Reminder Notice20-DEC-2018State -
16000501500032SOXState Compliance achieved12-AUG-2015State -
16000501500031SOXState Compliance achieved12-AUG-2015State -
11000381100021SIFState Public Notification received02-NOV-2010State -
10000340900018SOXState Compliance achieved28-JUN-2010State -
10000340900020SOXState Compliance achieved28-JUN-2010State -
10000340900019SOXState Compliance achieved28-JUN-2010State -
10000350900017SOXState Compliance achieved28-JUN-2010State -
09000330900009SOXState Compliance achieved17-AUG-2009State -
09000210900010SIFState Public Notification received17-NOV-2008State -
09000250900011SIFState Public Notification received17-NOV-2008State -
01000130100003SIFState Public Notification received22-MAY-2001State -
01000140100004SIFState Public Notification received22-MAY-2001State -
97000039700002SIFState Public Notification received03-DEC-1996State -
  • 1 - 16 of 16

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
BF3762YesWell Ground waterPermanentActive
BF37799YesWell Ground waterPermanentInactive
WK8593YesWell Ground waterPermanentActive
1110111211101112NoDistribution System/Zone - - Active
BF3762TNoTreatment Plant - - Active
WK8593TNoTreatment Plant - - Active
BF37799TNoTreatment Plant - - Inactive
  • 1 - 7 of 7

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
BF3762TFluoridationOther
BF3762THypochlorination, PostDisinfection
WK8593TFluoridationOther
WK8593THypochlorination, PostDisinfection
  • 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.