U.S. flag

An official website of the United States government

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDTX2140004
PWS NameUNION WSC
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served5793
County ServedStarr

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
OtherConsumer Confidence Report Inadequate ReportingConsumer Confidence RuleConsumer Confidence Rule1245Open01-JUL-2025 - No
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1244Open01-MAY-2025 - No
RPTLSL ReportingLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS1243Open17-OCT-2024 - No
TTLSL InventoryLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS1242Open17-OCT-2024 - Yes
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule1221Returned to Compliance30-DEC-2016 - No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule1220Returned to Compliance01-OCT-2016 - No
MRMonitoring, Turbidity (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule1217Returned to Compliance01-JAN-201631-JAN-2016No
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1215Returned to Compliance10-NOV-2014 - No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)1214Returned to Compliance01-JUL-201431-JUL-2014No
MRLead Consumer NoticeLead and Copper RuleLead and Copper Rule1211Returned to Compliance30-DEC-2013 - No
TTMonthly Turbidity Exceed (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule1210Returned to Compliance01-APR-201330-APR-2013Yes
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice1222Returned to Compliance01-APR-2013 - No
TTMonthly Turbidity Exceed (Enhanced SWTR)Interim and Long Term 1 Enhanced Surface Water Treatment RuleInterim Enhanced Surface Water Treatment Rule105Returned to Compliance01-JAN-200531-JAN-2005Yes
TTTreatment Technique (SWTR and GWR)Surface Water Treatment RuleSurface Water Treatment Rule305Returned to Compliance01-DEC-200431-DEC-2004Yes
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule1205Returned to Compliance01-DEC-200431-DEC-2004No
MCLMaximum Contaminant Level Violation, AverageStage 1 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)205Returned to Compliance01-OCT-200431-DEC-2004Yes
MCLMaximum Contaminant Level Violation, AverageStage 1 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)805Returned to Compliance01-JUL-200430-SEP-2004Yes
MCLMaximum Contaminant Level Violation, AverageStage 1 Disinfectants and Disinfection Byproducts RuleTTHM705Returned to Compliance01-JUL-200430-SEP-2004Yes
MCLMaximum Contaminant Level Violation, AverageStage 1 Disinfectants and Disinfection Byproducts RuleTTHM504Returned to Compliance01-APR-200430-JUN-2004Yes
MCLMaximum Contaminant Level Violation, AverageStage 1 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)604Returned to Compliance01-APR-200430-JUN-2004Yes
OtherConsumer Confidence Report Complete Failure to ReportConsumer Confidence RuleConsumer Confidence Rule403Returned to Compliance01-JUL-2003 - No
MRInitial Tap Sampling for Pb and CuLead and Copper RuleLead and Copper Rule9999193Returned to Compliance01-JUL-199230-JUN-1993No
  • 1 - 22 of 22

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
21551245SIAState Violation/Reminder Notice31-DEC-2025State -
21511244SIAState Violation/Reminder Notice28-MAY-2025State -
21481242SIEState Public Notification requested31-MAR-2025State -
21501243SIEState Public Notification requested31-MAR-2025State -
21431220SOXState Compliance achieved03-DEC-2018State -
21421221SOXState Compliance achieved30-NOV-2017State -
21421211SOXState Compliance achieved30-NOV-2017State -
21381214SIFState Public Notification received28-AUG-2017State -
21371215SOXState Compliance achieved28-AUG-2017State -
21361222SOXState Compliance achieved13-MAR-2017State -
21351210SIFState Public Notification received13-MAR-2017State -
21271217SIFState Public Notification received31-MAY-2016State -
2107504SOXState Compliance achieved03-SEP-2013State09/03/2013;KSAMPLES; RECEIVED SAMPLE BELOW MCL
2107205SOXState Compliance achieved03-SEP-2013State09/03/2013;KSAMPLES; RECEIVED SAMPLE BELOW MCL
2107604SOXState Compliance achieved03-SEP-2013State09/03/2013;KSAMPLES; RECEIVED SAMPLE BELOW MCL
2107805SOXState Compliance achieved03-SEP-2013State09/03/2013;KSAMPLES; RECEIVED SAMPLE BELOW MCL
2107705SOXState Compliance achieved03-SEP-2013State09/03/2013;KSAMPLES; RECEIVED SAMPLE BELOW MCL
2118105SOXState Compliance achieved01-DEC-2006StateCMiddleton; 07/23/2015; Data clean up, added SOX code after the first month in the TXSWTR database with data for this system (11/2006).
2118305SOXState Compliance achieved01-DEC-2006StateCMiddleton; 07/23/2015; Data clean up, added SOX code after the first month in the TXSWTR database with data for this system (11/2006).
21081205SOXState Compliance achieved06-NOV-2006State -
1904403SOXState Compliance achieved20-JUL-2004StateCCR2002 - COMPLY
1939999193SOXState Compliance achieved30-JUN-1993State -
  • 1 - 22 of 22

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
INTAKE 1 - RIO GRANDE PLANT 133828YesIntakeSurface waterOtherInactive
INTAKE 4 - TERMINAL RES / PLANT 233831YesIntakeSurface waterPermanentActive
INTAKE 3 - RIO GRANDE33830YesIntakeSurface waterPermanentActive
INTAKE 2 - TERM RES / PLANT 133829YesIntakeSurface waterOtherInactive
RAW-TAP117696NoCommon Headers - - Active
DISTRIBUTION SYSTEM45320NoDistribution System/Zone - - Active
PLANT SITE - 1250 GPM - SP72408NoPump Facility - - Active
PLANT SITE - 650 GPM - SP72409NoPump Facility - - Active
PLANT SITE - 650 GPM - SP72410NoPump Facility - - Active
5992 FM 1430; RIO GRANDE CITY139980NoSampling Station - - Active
5992 FM 1430, RIO GRANDE CITY58231NoSampling Station - - Active
PLANT 1 - 5986 HWY 143061983NoSampling Station - - Inactive
HWY 83 /E OF LA PUERTA - 0.15 MG - EL127174NoStorage - - Active
FM 1430 / 0.1 MI E HWY 83 - 0.100 MG -EL89453NoStorage - - Active
PLANT SITE - 0.120 MG - GR89454NoStorage - - Active
SWTP 2 - 5992 FM 14308195NoTreatment Plant - - Active
OLD PLANT12530NoTreatment Plant - - Inactive
NEW PLANT TRAIN B12531NoTreatment Plant - - Inactive
  • 1 - 18 of 18

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
SWTP 2 - 5992 FM 14308195Hypochlorination, PreDisinfection
SWTP 2 - 5992 FM 14308195InnovativeDisinfection
SWTP 2 - 5992 FM 14308195InnovativeDisinfection
SWTP 2 - 5992 FM 14308195InnovativeParticulate removal
SWTP 2 - 5992 FM 14308195Filtration, Rapid SandParticulate removal
SWTP 2 - 5992 FM 14308195Hypochlorination, PostDisinfection
SWTP 2 - 5992 FM 14308195InnovativeDisinfection
SWTP 2 - 5992 FM 14308195InnovativeDisinfection
SWTP 2 - 5992 FM 14308195InnovativeDisinfection
  • 1 - 9 of 9

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.