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PWS ID	TX1260022
PWS Name	CITY OF RIO VISTA
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	1040
County Served	Johnson

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
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	120	Open	15-MAY-2025	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	121	Returned to Compliance	01-MAY-2025	31-MAY-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	119	Returned to Compliance	01-APR-2025	30-APR-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	123	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	118	Returned to Compliance	01-MAR-2025	31-MAR-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	45	Returned to Compliance	01-FEB-2025	28-FEB-2025	No
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	44	Returned to Compliance	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	43	Returned to Compliance	17-OCT-2024	-	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	41	Returned to Compliance	01-JUL-2024	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	38	Returned to Compliance	01-FEB-2024	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	37	Returned to Compliance	01-JUL-2023	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	36	Returned to Compliance	01-JAN-2023	31-JAN-2023	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	35	Returned to Compliance	01-SEP-2022	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	34	Returned to Compliance	01-AUG-2021	31-AUG-2021	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	33	Returned to Compliance	01-JUL-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	31	Returned to Compliance	15-MAR-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	29	Returned to Compliance	01-JUL-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	28	Returned to Compliance	01-JUN-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	27	Returned to Compliance	01-MAY-2020	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	26	Returned to Compliance	01-OCT-2019	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	25	Returned to Compliance	01-JUL-2019	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	23	Returned to Compliance	01-JUN-2019	30-JUN-2019	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	22	Returned to Compliance	01-MAY-2019	31-MAY-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	24	Returned to Compliance	01-APR-2019	30-JUN-2019	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	21	Returned to Compliance	01-APR-2019	30-APR-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	18	Returned to Compliance	01-JAN-2017	31-MAR-2017	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	15	Returned to Compliance	08-FEB-2016	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	10	Returned to Compliance	01-OCT-2015	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	9	Returned to Compliance	01-JUL-2014	30-SEP-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	8	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	5	Returned to Compliance	01-APR-2013	30-JUN-2013	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6	Returned to Compliance	01-JAN-2013	31-MAR-2013	No

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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
106	123	SOX	State Compliance achieved	08-DEC-2025	State	20251208. EPAYNE. SOX BASED ON 3Q2025 ON TIME WITH NO ISSUES.
97	121	SIF	State Public Notification received	17-JUL-2025	State	-
95	31	SOX	State Compliance achieved	17-JUL-2025	State	-
100	41	SOX	State Compliance achieved	17-JUL-2025	State	07/17/2025; KRAMIREZ; SYSTEM SUBMITTED AN ADEQUATE 2024 CCR ON 7/15/25 TO RTC PREV YEAR
98	119	SIF	State Public Notification received	17-JUL-2025	State	-
99	118	SIF	State Public Notification received	17-JUL-2025	State	-
101	45	SIF	State Public Notification received	17-JUL-2025	State	-
96	26	SIF	State Public Notification received	17-JUL-2025	State	-
91	120	SIA	State Violation/Reminder Notice	16-JUN-2025	State	-
86	44	SOX	State Compliance achieved	22-APR-2025	State	-
85	43	SOX	State Compliance achieved	22-APR-2025	State	-
73	36	SIF	State Public Notification received	07-MAR-2024	State	-
72	38	SOX	State Compliance achieved	07-MAR-2024	State	-
70	33	SOX	State Compliance achieved	03-NOV-2023	State	11/03/2023; KRAMIREZ; SYSTEM SUBMITTED AN ADEQUATE 2022 CCR/COD TO RTC PREV CCR YEAR
69	37	SOX	State Compliance achieved	03-NOV-2023	State	11/03/2023; KRAMIREZ; SYSTEM SUBMITTED AN ADEQUATE 2022 CCR/COD
63	35	SOX	State Compliance achieved	08-DEC-2022	State	-
64	34	SIF	State Public Notification received	08-DEC-2022	State	-
52	22	SIF	State Public Notification received	05-OCT-2020	State	-
50	23	SIF	State Public Notification received	05-OCT-2020	State	-
55	24	SIF	State Public Notification received	05-OCT-2020	State	-
49	29	SOX	State Compliance achieved	05-OCT-2020	State	-
51	28	SOX	State Compliance achieved	05-OCT-2020	State	-
53	27	SOX	State Compliance achieved	05-OCT-2020	State	-
54	21	SIF	State Public Notification received	05-OCT-2020	State	-
48	25	SOX	State Compliance achieved	29-SEP-2020	State	-
26	18	SIF	State Public Notification received	27-SEP-2017	State	-
22	10	SOX	State Compliance achieved	17-MAR-2017	State	-
18	15	SOX	State Compliance achieved	28-JUN-2016	State	-
13	9	SOX	State Compliance achieved	19-MAR-2015	State	20150319; KMURPHY
13	8	SOX	State Compliance achieved	19-MAR-2015	State	20150319; KMURPHY
7	6	SOX	State Compliance achieved	17-JUL-2014	State	Submitted first quarter of 2014 DLQOR
7	5	SOX	State Compliance achieved	17-JUL-2014	State	Submitted first quarter of 2014 DLQOR

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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 JOHNSON COUNTY SUD	34289	Yes	Consecutive Connection	Ground water	Other	Inactive
2 - 401 TOWER RD	20875	Yes	Well	Ground water	Permanent	Active
1 - 403 CENTRAL AVE	20814	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	42917	No	Distribution System/Zone	-	-	Active
401 TOWER RD - 500 GPM - SP	125385	No	Pump Facility	-	-	Active
403 CENTRAL AVE - 300 GPM - SP	125386	No	Pump Facility	-	-	Active
403 CENTRAL AVE - 300 GPM - SP	125387	No	Pump Facility	-	-	Active
401 TOWER RD - 500 GPM - SP	70040	No	Pump Facility	-	-	Active
401 TOWER RD - 500 GPM - SP	70041	No	Pump Facility	-	-	Active
401 TOWER RD; RIO VISTA	137585	No	Sampling Station	-	-	Active
403 CENTRAL AVE; RIO VISTA	137586	No	Sampling Station	-	-	Active
403 CENTRAL AVE, RIO VISTA	54784	No	Sampling Station	-	-	Active
401 TOWER RD, RIO VISTA	54785	No	Sampling Station	-	-	Active
401 TOWER RD - 0.100 MG - GR	113227	No	Storage	-	-	Active
401 TOWER RD - 0.075 MG - EL	87211	No	Storage	-	-	Active
403 CENTRAL AVE - 0.100 MG - GR	87212	No	Storage	-	-	Active
PLANT 2 - 401 TOWER RD	62782	No	Treatment Plant	-	-	Active
PLANT 1 - 403 CENTRAL AVE	6492	No	Treatment Plant	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PLANT 2 - 401 TOWER RD	62782	Gaseous Chlorination, Pre	Disinfection
PLANT 1 - 403 CENTRAL AVE	6492	Gaseous Chlorination, Pre	Disinfection

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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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