Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	TX0940085
PWS Name	OAK HILLS RANCH WATER
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	624
County Served	Guadalupe

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
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	100069209	Returned to Compliance	01-APR-2025	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	100069210	Known	01-JAN-2025	30-JUN-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	100069206	Returned to Compliance	01-SEP-2024	30-SEP-2024	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069204	Returned to Compliance	18-AUG-2024	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	100069203	Returned to Compliance	01-JUL-2024	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	100069207	Known	01-JUL-2024	31-DEC-2024	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	100069202	Returned to Compliance	01-JUL-2024	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	100069200	Known	01-JAN-2024	30-JUN-2024	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	100069198	Known	01-JUL-2023	31-DEC-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	100069197	Returned to Compliance	01-JUL-2023	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	100069195	Known	01-JAN-2023	30-JUN-2023	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	100069194	Returned to Compliance	01-JUL-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069188	Returned to Compliance	03-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069192	Returned to Compliance	02-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069190	Returned to Compliance	02-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069189	Returned to Compliance	02-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069193	Returned to Compliance	02-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069191	Returned to Compliance	02-APR-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069186	Returned to Compliance	23-DEC-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069187	Returned to Compliance	19-DEC-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069184	Returned to Compliance	02-OCT-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069183	Returned to Compliance	22-JUL-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069182	Returned to Compliance	04-JUL-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069180	Returned to Compliance	18-APR-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069181	Returned to Compliance	18-APR-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069178	Returned to Compliance	18-APR-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069179	Returned to Compliance	15-MAR-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069177	Returned to Compliance	25-FEB-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069176	Returned to Compliance	16-JAN-2021	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	100069130	Returned to Compliance	01-OCT-2020	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	100069175	Returned to Compliance	01-OCT-2020	31-DEC-2020	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069129	Returned to Compliance	13-SEP-2020	-	No
TT	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	100069125	Returned to Compliance	02-JUL-2020	-	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	100069133	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	100069128	Returned to Compliance	01-JUL-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069122	Returned to Compliance	31-MAY-2020	-	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	100069124	Returned to Compliance	12-MAY-2020	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	100069126	Returned to Compliance	01-APR-2020	30-JUN-2020	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069098	Returned to Compliance	23-MAR-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069095	Returned to Compliance	12-JAN-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	100069096	Returned to Compliance	09-JAN-2020	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	100069153	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	100069150	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	100069149	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	100069148	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	100069147	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	100069146	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	100069145	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	100069144	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	100069143	Returned to Compliance	01-JAN-2020	31-DEC-2020	No

1 - 50 of 252

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
100117333	100069210	SIE	State Public Notification requested	03-SEP-2025	State	-
100117329	100069200	SIF	State Public Notification received	29-JUL-2025	State	-
100117327	100069202	SIF	State Public Notification received	29-JUL-2025	State	-
100117330	100069204	SOX	State Compliance achieved	29-JUL-2025	State	-
100117325	100069207	SIF	State Public Notification received	29-JUL-2025	State	-
100117331	100069197	SIF	State Public Notification received	29-JUL-2025	State	-
100117323	100069206	SIF	State Public Notification received	29-JUL-2025	State	-
100117322	100069203	SOX	State Compliance achieved	23-JUL-2025	State	07/23/2025; KRAMIREZ; SYSTEM SUBMITTED ADEQUATE 2024 CCR
100117321	100069209	SOX	State Compliance achieved	16-JUL-2025	State	07/07/2025;ADEQUATE LCN RECEIVED;JMP
100117293	100069198	SIF	State Public Notification received	04-JUN-2024	State	-
100117295	100069195	SIF	State Public Notification received	04-JUN-2024	State	-
100117285	100069194	SOX	State Compliance achieved	15-AUG-2023	State	08/15/2023; KRAMIREZ; SYSTEM SUBMITTED ADEQUATE 2022 CCR TO RTC PREV CCR YEAR
100117278	100069124	SOX	State Compliance achieved	21-OCT-2022	State	-
100117252	100069158	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069159	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069160	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069161	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069162	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069163	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069164	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069165	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069166	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069167	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069168	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069169	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069170	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069171	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069172	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069173	SIF	State Public Notification received	07-JUL-2022	State	-
100117260	100069174	SIF	State Public Notification received	07-JUL-2022	State	-
100117231	100069175	SIF	State Public Notification received	07-JUL-2022	State	-
100117230	100069063	SOX	State Compliance achieved	07-JUL-2022	State	-
100117240	100069095	SOX	State Compliance achieved	07-JUL-2022	State	-
100117265	100069096	SOX	State Compliance achieved	07-JUL-2022	State	-
100117238	100069098	SOX	State Compliance achieved	07-JUL-2022	State	-
100117257	100069122	SOX	State Compliance achieved	07-JUL-2022	State	-
100117261	100069129	SOX	State Compliance achieved	07-JUL-2022	State	-
100117273	100069176	SOX	State Compliance achieved	07-JUL-2022	State	-
100117271	100069177	SOX	State Compliance achieved	07-JUL-2022	State	-
100117255	100069178	SOX	State Compliance achieved	07-JUL-2022	State	-
100117263	100069179	SOX	State Compliance achieved	07-JUL-2022	State	-
100117247	100069180	SOX	State Compliance achieved	07-JUL-2022	State	-
100117249	100069181	SOX	State Compliance achieved	07-JUL-2022	State	-
100117236	100069182	SOX	State Compliance achieved	07-JUL-2022	State	-
100117242	100069183	SOX	State Compliance achieved	07-JUL-2022	State	-
100117234	100069184	SOX	State Compliance achieved	07-JUL-2022	State	-
100117267	100069186	SOX	State Compliance achieved	07-JUL-2022	State	-
100117232	100069187	SOX	State Compliance achieved	07-JUL-2022	State	-
100117230	100069188	SOX	State Compliance achieved	07-JUL-2022	State	-
100117251	100069189	SOX	State Compliance achieved	07-JUL-2022	State	-

1 - 50 of 252

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
2 - NEW WELL / 300 FT NORTH OF OLD WELL	17062	Yes	Well	Ground water	Permanent	Active
1 - OLD WELL / 234 SANDY OAKS DR	17108	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	40779	No	Distribution System/Zone	-	-	Active
MAIN WATER PLANT - 150 GPM - SP	121690	No	Pump Facility	-	-	Active
MAIN WATER PLANT - 150 GPM - SP	121692	No	Pump Facility	-	-	Active
234 SHADY OAKS; SEGUINE	135366	No	Sampling Station	-	-	Active
234 SHADY OAKS, SEGUIN	51513	No	Sampling Station	-	-	Active
MAIN WATER PLANT - 0.0025 MG - HD	121681	No	Storage	-	-	Active
MAIN WATER PLANT - 0.0025 MG - HD	121683	No	Storage	-	-	Active
MAIN WATER PLANT - 0.044 MG - GR	121685	No	Storage	-	-	Active
MAIN WATER PLANT - 0.01 MG - GR	121687	No	Storage	-	-	Inactive
PLANT - OAK HILL RANCH	5311	No	Treatment Plant	-	-	Active

1 - 12 of 12

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PLANT - OAK HILL RANCH	5311	Aeration, Packed Tower	Taste / odor control
PLANT - OAK HILL RANCH	5311	Gaseous Chlorination, Pre	Disinfection

1 - 2 of 2

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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