Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	TX1050001
PWS Name	CITY OF SAN MARCOS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	72970
County Served	Hays

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.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	176	Known	01-OCT-2025	31-DEC-2025	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	149	Returned to Compliance	01-FEB-2021	28-FEB-2021	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	144	Returned to Compliance	18-MAY-2016	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	143	Returned to Compliance	01-JAN-2016	31-MAR-2016	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	136	Returned to Compliance	30-DEC-2015	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	132	Returned to Compliance	01-JUL-2014	30-SEP-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	124	Returned to Compliance	01-APR-2014	30-JUN-2014	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	116	Returned to Compliance	30-MAR-2014	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	122	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	111	Returned to Compliance	01-OCT-2013	31-DEC-2013	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	103	Returned to Compliance	01-JAN-2003	31-JAN-2003	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
42	176	SIF	State Public Notification received	08-DEC-2025	State	-
39	149	SIF	State Public Notification received	09-MAY-2022	State	-
33	143	SOX	State Compliance achieved	16-JUN-2016	State	07/08/16; SOXED 1Q2016 DBP2-05 VIOL BASED ON 2Q2016 LRAA
31	144	SOX	State Compliance achieved	19-MAY-2016	State	-
27	136	SOX	State Compliance achieved	17-FEB-2016	State	-
22	132	SFO	State Administrative/Compliance Order with penalty issued	09-APR-2015	State	DOCKET NO 2014-1188-PWS-E; FILE CLOSED 7/6/2015
22	122	SFO	State Administrative/Compliance Order with penalty issued	09-APR-2015	State	DOCKET NO 2014-1188-PWS-E; FILE CLOSED 7/6/2015
22	111	SFO	State Administrative/Compliance Order with penalty issued	09-APR-2015	State	DOCKET NO 2014-1188-PWS-E; FILE CLOSED 7/6/2015
22	124	SFO	State Administrative/Compliance Order with penalty issued	09-APR-2015	State	DOCKET NO 2014-1188-PWS-E; FILE CLOSED 7/6/2015
8	116	SOX	State Compliance achieved	11-JUN-2014	State	-
10	103	SOX	State Compliance achieved	01-MAR-2003	State	PWS HAS MET THE REQUIREMENTS TO BE RETURNED TO COMPLIANCE

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
GW FROM ALLIANCE REGIONAL WATER AUTH	159403	Yes	Consecutive Connection	Ground water	Permanent	Active
9 - GREEN HAVEN WELL 114 / PLUGGED	17829	Yes	Well	Ground water	Permanent	Inactive
OLD WELL 1 / PLUGGED	17819	Yes	Well	Ground water	Permanent	Inactive
11 -OAK RIDGE ESTATES WELL #116-2	19744	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
7 - SM ESTATES 1 (GUI) / PLUGGED	19735	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
8 - ESTATES OF SM WELL 111-2 / PLUGGED	19719	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
10 -OAK RIDGE ESTATES WELL #116-1	18067	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
OAK RIDGE 1 (GUI)	111508	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
5 - COMANCHE PS	17832	Yes	Well	Ground water	Permanent	Active
6 - 2827 GREAT OAKS DR	17831	Yes	Well	Ground water	Permanent	Active
SOYAR	17828	Yes	Well	Ground water	Permanent	Active
11 - MCCARTY LN 2	155809	Yes	Well	Ground water	Permanent	Active
10 - MCCARTY LN 1	155808	Yes	Well	Ground water	Permanent	Active
FORMERLY G1050087A - 1815 MESQUITE	111507	Yes	Well	Ground water	Permanent	Active
2 - SPRING LAKE PS (GUI)	17834	Yes	Well	Ground water under the influence of surface water	Permanent	Active
1 - SPRING LAKE PS (GUI)	17833	Yes	Well	Ground water under the influence of surface water	Permanent	Active
12 - WILLOW CREEK	169626	Yes	Well	Ground water	Other	Inactive
4 - COMMANCHE PS	19731	Yes	Well	Ground water under the influence of surface water	Other	Inactive
OAK RIDGE 2 (GUI)	111509	Yes	Well	Ground water under the influence of surface water	Other	Inactive
INTAKE 1 - LK DUNLAP	33550	Yes	Intake	Surface water	Permanent	Active
RAW-TAP	117520	No	Common Headers	-	-	Active
RAW-TAP	117521	No	Common Headers	-	-	Inactive
RAW-TAP	117522	No	Common Headers	-	-	Inactive
DISTRIBUTION SYSTEM	42200	No	Distribution System/Zone	-	-	Active
KINGSWOOD - 200 GPM SP	111456	No	Pump Facility	-	-	Active
KINGSWOOD - 200 GPM SP	111457	No	Pump Facility	-	-	Active
OAK RIDGE - 3600 GPM SP	111499	No	Pump Facility	-	-	Active
OAK RIDGE - 3600 GPM SP	111500	No	Pump Facility	-	-	Active
OAK RIDGE - 3600 GPM SP	111501	No	Pump Facility	-	-	Active
OAK RIDGE - 200 GPM SP	111502	No	Pump Facility	-	-	Active
OAK RIDGE - 200 GPM SP	111503	No	Pump Facility	-	-	Active
SWTP - 4500 GPM SP	122205	No	Pump Facility	-	-	Active
SWTP - 3500 GPM SP	122206	No	Pump Facility	-	-	Active
2826 RR 12 - 1460 GPM - BP	169614	No	Pump Facility	-	-	Active
2826 RR 12 - 1460 GPM - BP	169615	No	Pump Facility	-	-	Active
2826 RR 12 - 1460 GPM - BP	169616	No	Pump Facility	-	-	Active
SOYAR - 800 GPM SP	71545	No	Pump Facility	-	-	Active
SOYAR - 800 GPM SP	71546	No	Pump Facility	-	-	Active
SOYAR - 800 GPM SP	71547	No	Pump Facility	-	-	Active
SOYAR - 800 GPM SP	71548	No	Pump Facility	-	-	Active
2827 GREAT OAKS DR - 200 GPM SP	71549	No	Pump Facility	-	-	Active
2827 GREAT OAKS DR - 200 GPM SP	71550	No	Pump Facility	-	-	Active
2827 GREAT OAKS DR - 200 GPM SP	71551	No	Pump Facility	-	-	Active
COMANCHE - 1200 GPM SP	71552	No	Pump Facility	-	-	Active
COMANCHE - 600 GPM SP	71553	No	Pump Facility	-	-	Active
COMANCHE - 600 GPM SP	71554	No	Pump Facility	-	-	Active
COMANCHE - 600 GPM SP	71555	No	Pump Facility	-	-	Active
SPRING LAKE - 2250 GPM SP	71560	No	Pump Facility	-	-	Active
SPRING LAKE - 2250 GPM SP	71564	No	Pump Facility	-	-	Active
SPRING LAKE - 2250 GPM SP	71565	No	Pump Facility	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
GUITP-PLANT - SPRING LAKE	10094	Hypochlorination, Pre	Disinfection
GUITP-PLANT - SPRING LAKE	10094	Innovative	Disinfection
GUITP-PLANT - SPRING LAKE	10094	Innovative	Disinfection
PLANT - KINGSWOOD / 1815 MESQUITE ST	111461	4-Log Treatment of Viruses	Disinfection
PLANT - KINGSWOOD / 1815 MESQUITE ST	111461	Gaseous Chlorination, Pre	Disinfection
PLANT - OAKRIDGE WTP	111506	Gaseous Chlorination, Pre	Disinfection
PLANT - OAKRIDGE WTP	111506	Filtration, Cartridge	Iron removal
MCCARTY LN	155811	Gaseous Chlorination, Post	Disinfection
MCCARTY LN	155811	Chloramines	Disinfection
MCCARTY LN	155811	4-Log Treatment of Viruses	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Gaseous Chlorination, Pre	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Gaseous Chlorination, Pre	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Rapid Mix	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Rapid Mix	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Coagulation	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Fluoridation	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Fluoridation	Other
PLANT - CITY OF SAN MARCOS SWTP	2877	Gaseous Chlorination, Post	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Gaseous Chlorination, Post	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Disinfection
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal
PLANT - CITY OF SAN MARCOS SWTP	2877	Innovative	Particulate removal

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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.

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