Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	TX1280007
PWS Name	EL OSO WSC
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	6288
County Served	Karnes

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
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	100068490	Returned to Compliance	02-JUL-2025	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068480	Returned to Compliance	01-JAN-2024	31-MAR-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068476	Returned to Compliance	01-JUL-2023	30-SEP-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068466	Returned to Compliance	01-OCT-2020	31-DEC-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068464	Returned to Compliance	01-APR-2020	30-JUN-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068461	Returned to Compliance	01-JAN-2020	31-MAR-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068374	Returned to Compliance	01-OCT-2017	31-DEC-2017	Yes
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	100068377	Returned to Compliance	01-OCT-2017	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068371	Returned to Compliance	01-JUL-2017	30-SEP-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068367	Returned to Compliance	01-APR-2017	30-JUN-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068365	Returned to Compliance	01-JAN-2016	31-MAR-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068361	Returned to Compliance	01-JUL-2015	30-SEP-2015	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100068358	Returned to Compliance	21-NOV-2014	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068359	Returned to Compliance	01-OCT-2014	31-DEC-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	100068357	Returned to Compliance	01-JUL-2014	30-SEP-2014	Yes
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	100068356	Returned to Compliance	01-AUG-2011	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	100068340	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	90060544	Returned to Compliance	01-JAN-2009	31-MAR-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	80049291	Returned to Compliance	01-OCT-2008	31-DEC-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	80040942	Returned to Compliance	01-JUL-2008	30-SEP-2008	Yes

1 - 20 of 20

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
100116859	100068490	SOX	State Compliance achieved	19-MAY-2026	State	04/27/2026;JMP;ADEQUATE PN RECEIVED
100116855	100068480	SOX	State Compliance achieved	03-OCT-2024	State	20241031; ELUKE; STATUS DATE CHANGED FROM 10/30/2024 TO 10/03/2024 TO REFLECT DATE MISSED ON NOE LIST. 20241030; EBAUCOM; VIOLS SOX'D BASED ON TTHM 3Q2024 DBP2-01 AND -02 LRAAS.
100116855	100068476	SOX	State Compliance achieved	03-OCT-2024	State	20241031; ELUKE; STATUS DATE CHANGED FROM 10/30/2024 TO 10/03/2024 TO REFLECT DATE MISSED ON NOE LIST. 20241030; EBAUCOM; VIOLS SOX'D BASED ON TTHM 3Q2024 DBP2-01 AND -02 LRAAS.
100116845	100068466	SOX	State Compliance achieved	25-MAR-2021	State	VIOL SOX'D BASED DBP2-01 TTHM 1Q2021 LRAA
100116840	100068461	SOX	State Compliance achieved	15-OCT-2020	State	VIOLS SOX'D BASED 3Q2020 DBP2-01 TTHM LRAA
100116840	100068464	SOX	State Compliance achieved	15-OCT-2020	State	VIOLS SOX'D BASED 3Q2020 DBP2-01 TTHM LRAA
100116834	100068377	SIF	State Public Notification received	02-JUL-2018	State	-
100116830	100068374	SIF	State Public Notification received	05-MAR-2018	State	-
100116828	100068367	SFJ	State Formal Notice of Violation issued	16-FEB-2018	State	ADMIN RESOLVED- MCL VIOLATION RTC'D PRIOR TO NOE DATE
100116828	100068371	SFJ	State Formal Notice of Violation issued	16-FEB-2018	State	ADMIN RESOLVED- MCL VIOLATION RTC'D PRIOR TO NOE DATE
100116817	100068365	SOX	State Compliance achieved	30-JUN-2016	State	07/21/16; SOXED VIOLATION BASED ON 2Q2016 TTHM LRAA
100116813	100068361	SOX	State Compliance achieved	04-NOV-2015	State	12/21/15;MGONZALES; SOXED VIOLATIONS BASED ON 4Q2015 LRAA
100116809	100068359	SOX	State Compliance achieved	17-JUL-2015	State	20150717;ABOWMAN; 2Q2015 LRAA= 70.07, Back in Compliance for DBP2-01
100116809	100068357	SOX	State Compliance achieved	17-JUL-2015	State	20150717;ABOWMAN; 2Q2015 LRAA= 70.07, Back in Compliance for DBP2-01
100116803	100068358	SIA	State Violation/Reminder Notice	08-DEC-2014	State	-
100116800	80040942	SOX	State Compliance achieved	10-JAN-2012	State	-
100116800	80049291	SOX	State Compliance achieved	10-JAN-2012	State	-
100116800	100068340	SOX	State Compliance achieved	10-JAN-2012	State	-
100116800	90060544	SOX	State Compliance achieved	10-JAN-2012	State	-
100116799	100068356	SIF	State Public Notification received	23-NOV-2011	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
5 - E OF 1	20328	Yes	Well	Ground water	Other	Inactive
3 - CR 202	20326	Yes	Well	Ground water	Permanent	Inactive
4 - W OF 3	20327	Yes	Well	Ground water	Permanent	Active
2 - 0.5 MI E OF 1	20325	Yes	Well	Ground water	Permanent	Active
1 - CR 189	20324	Yes	Well	Ground water	Permanent	Active
6 - 1668 CR 202 E	131873	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	42997	No	Distribution System/Zone	-	-	Active
PP3 - RAY POINT - 500 GPM - SP	128205	No	Pump Facility	-	-	Active
PP2 - EL OSO - 500 GPM - SP	128207	No	Pump Facility	-	-	Active
PP2 - EL OSO - 500 GPM - SP	128208	No	Pump Facility	-	-	Active
PP3 - RAY POINT - 500 GPM - SP	74549	No	Pump Facility	-	-	Active
PP3 - RAY POINT - 500 GPM - SP	74550	No	Pump Facility	-	-	Active
PP1 - FALLS CITY - 1500 GPM - SP	74551	No	Pump Facility	-	-	Active
PP1 - FALLS CITY - 1500 GPM - SP	74552	No	Pump Facility	-	-	Active
PP1 - FALLS CITY - 1500 GPM - SP	74553	No	Pump Facility	-	-	Active
PP2 - EL OSO - 800 GPM - SP	74554	No	Pump Facility	-	-	Active
PP2 - EL OSO - 800 GPM - SP	74555	No	Pump Facility	-	-	Active
2545 CR 189; KARNES CITY	137668	No	Sampling Station	-	-	Active
1668 CR 202E; FALLS CITY	137669	No	Sampling Station	-	-	Active
2545 CR 189, KARNES CITY	54880	No	Sampling Station	-	-	Active
1668 CR 202E, FALLS CITY	54881	No	Sampling Station	-	-	Active
PP1 - FALLS CITY - 0.5 MG - GR	116747	No	Storage	-	-	Active
PP2 - EL OSO - 0.320 MG - GR	128206	No	Storage	-	-	Active
PP2 - EL OSO - 0.5 MG - GR	128234	No	Storage	-	-	Active
PP3 - RAY POINT - 0.125 MG - GR	91502	No	Storage	-	-	Active
PP2 - EL OSO - 0.15 MG - GR	91505	No	Storage	-	-	Active
PP3 - RAY POINT - 0.2 MG - GR	91506	No	Storage	-	-	Active
PP1 - EL OSO - 0.235 MG - ST	91507	No	Storage	-	-	Active
PP2 - KENEDY TOWERS - 0.15 MG - EL	91508	No	Storage	-	-	Active
PP2 - KENEDY TOWERS - 0.07 MG - EL	91509	No	Storage	-	-	Active
PP3 - RAY POINT - 0.5 MG - ST	91510	No	Storage	-	-	Active
PP1 - PLANT 2 - 0.5 MG - GR	128235	No	Storage	-	-	Inactive
PP1 - PLANT 2 - 0.428 MG - GR	91503	No	Storage	-	-	Inactive
PP1 - PLANT 2 - 0.22 MG - GR	91504	No	Storage	-	-	Inactive
PLANT 2 - EL OSO	8094	No	Treatment Plant	-	-	Active
PLANT 1 - FALL CITY	8582	No	Treatment Plant	-	-	Active

1 - 36 of 36

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PLANT 2 - EL OSO	8094	Aeration, Cascade	Taste / odor control
PLANT 2 - EL OSO	8094	Gaseous Chlorination, Pre	Disinfection
PLANT 1 - FALL CITY	8582	Gaseous Chlorination, Pre	Disinfection

1 - 3 of 3

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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