Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0111100
PWS Name	ANTONITO TOWN OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Groundwater under influence of surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	981
County Served	Conejos

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	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002935	Returned to Compliance	01-NOV-2025	-	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002937	Returned to Compliance	01-NOV-2025	30-NOV-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3002936	Returned to Compliance	01-OCT-2025	31-DEC-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002932	Returned to Compliance	01-JUL-2025	31-JUL-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002933	Returned to Compliance	01-JUL-2025	31-JUL-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3002934	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3002929	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002928	Returned to Compliance	01-JAN-2025	31-JAN-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002927	Returned to Compliance	01-JAN-2025	31-JAN-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	3002923	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	3002915	Returned to Compliance	01-JAN-2024	31-MAR-2024	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002911	Returned to Compliance	01-SEP-2023	30-SEP-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002912	Returned to Compliance	01-SEP-2023	30-SEP-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3002913	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	3002908	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002906	Returned to Compliance	01-DEC-2022	31-DEC-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002907	Returned to Compliance	01-DEC-2022	31-DEC-2022	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	3002904	Returned to Compliance	25-FEB-2022	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	3002903	Returned to Compliance	25-NOV-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	3002873	Returned to Compliance	27-AUG-2020	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	3002893	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	3002892	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	3002891	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	3002890	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	3002889	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	3002888	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	3002887	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	3002886	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	3002885	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	3002884	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	3002883	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	3002882	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	3002881	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	3002880	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	3002879	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	3002878	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	3002877	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	3002876	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	3002875	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	3002874	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	3002872	Returned to Compliance	01-JUL-2020	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	3002894	Returned to Compliance	01-JUL-2020	30-SEP-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	3002871	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	3002870	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	3002869	Returned to Compliance	17-FEB-2020	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	3002868	Returned to Compliance	01-JAN-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	3002867	Returned to Compliance	17-NOV-2019	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	3002866	Returned to Compliance	01-OCT-2019	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	3002865	Returned to Compliance	01-JUL-2019	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	3002862	Returned to Compliance	01-JUL-2019	-	No

1 - 50 of 186

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
3549899	3002936	SOX	State Compliance achieved	17-DEC-2025	State	SOXing; the result was received on 12/17/2025. MM 12/17/2025
3549899	3002935	SOX	State Compliance achieved	17-DEC-2025	State	SOXing; the result was received on 12/17/2025. MM 12/17/2025
3549899	3002937	SOX	State Compliance achieved	17-DEC-2025	State	SOXing; the result was received on 12/17/2025. MM 12/17/2025
3549892	3002932	SOX	State Compliance achieved	15-AUG-2025	State	SOXing; the system monitored and reported correctly for August 2025. MM 11/3/2025
3549892	3002934	SOX	State Compliance achieved	15-AUG-2025	State	SOXing; the system monitored and reported correctly for August 2025. MM 11/3/2025
3549892	3002933	SOX	State Compliance achieved	15-AUG-2025	State	SOXing; the system monitored and reported correctly for August 2025. MM 11/3/2025
3549885	3002923	SIF	State Public Notification received	26-JUN-2025	State	PN performed with 2025 CCR. MM 7/2/2025
3549885	3002915	SIF	State Public Notification received	26-JUN-2025	State	PN performed with 2025 CCR. MM 7/2/2025
3549882	3002927	SOX	State Compliance achieved	12-FEB-2025	State	SOXing, monitored and reported (2/8/2025) correctly for February 2025 without additional M&R violations in accordance with the rule. MM 4/25/2025
3549882	3002929	SOX	State Compliance achieved	12-FEB-2025	State	SOXing, monitored and reported (2/8/2025) correctly for February 2025 without additional M&R violations in accordance with the rule. MM 4/25/2025
3549882	3002928	SOX	State Compliance achieved	12-FEB-2025	State	SOXing, monitored and reported (2/8/2025) correctly for February 2025 without additional M&R violations in accordance with the rule. MM 4/25/2025
3549863	3002908	SIF	State Public Notification received	27-JUN-2024	State	PN performed with 2024 CCR. MM 6/27/2024
3549863	3002913	SIF	State Public Notification received	27-JUN-2024	State	PN performed with 2024 CCR. MM 6/27/2024
3549863	3002912	SIF	State Public Notification received	27-JUN-2024	State	PN performed with 2024 CCR. MM 6/27/2024
3549863	3002911	SIF	State Public Notification received	27-JUN-2024	State	PN performed with 2024 CCR. MM 6/27/2024
3549846	3002907	SOX	State Compliance achieved	08-FEB-2023	State	-
3549846	3002906	SOX	State Compliance achieved	08-FEB-2023	State	-
3549881	3002904	SOX	State Compliance achieved	10-JUN-2022	State	PN Completed in 2022 CCR - JAD
3549881	3002903	SOX	State Compliance achieved	10-JUN-2022	State	PN Completed in 2022 CCR - JAD
3549829	3002864	SIF	State Public Notification received	18-JUN-2021	State	-
3549830	3002873	SOX	State Compliance achieved	17-JUN-2021	State	-
3549828	3002880	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002893	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002892	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002891	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002890	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002889	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002888	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002874	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002875	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002876	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002877	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002878	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002879	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002894	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002881	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002882	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002883	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002884	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002885	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002886	SOX	State Compliance achieved	19-NOV-2020	State	-
3549828	3002887	SOX	State Compliance achieved	19-NOV-2020	State	-
3549825	3002872	SOX	State Compliance achieved	01-OCT-2020	State	-
3549825	3002868	SOX	State Compliance achieved	01-OCT-2020	State	-
3549825	3002862	SOX	State Compliance achieved	01-OCT-2020	State	-
3549823	3002871	SOX	State Compliance achieved	10-AUG-2020	State	-
3549823	3002870	SOX	State Compliance achieved	10-AUG-2020	State	-
3549817	3002869	SOX	State Compliance achieved	09-JUN-2020	State	PN performed 5/23/2020 BJK
3549817	3002867	SOX	State Compliance achieved	09-JUN-2020	State	PN performed 5/23/2020 BJK
3549810	3002860	SOX	State Compliance achieved	19-NOV-2019	State	-

1 - 50 of 184

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INFILTRATION GALLERY NO 1	1752	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL NO 1	1751	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	6544	No	Distribution System/Zone	-	-	Active
COMBINED CT SAMPLE POINT	21959	No	Sampling Station	-	-	Active
COMBINED RAW SOURCE	21960	No	Sampling Station	-	-	Active
STORAGE TANK NO 1 FOR CT	20004	No	Storage	-	-	Active
STORAGE TANK NO 2 FOR CT	21958	No	Storage	-	-	Active
BACK UP DISINFECTION FOR WELL NO 1	22470	No	Treatment Plant	-	-	Active
TREATMENT PLANT	3511	No	Treatment Plant	-	-	Active

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BACK UP DISINFECTION FOR WELL NO 1	22470	Hypochlorination, Pre	Disinfection
TREATMENT PLANT	3511	Innovative	Disinfection
TREATMENT PLANT	3511	Coagulation	Particulate removal
TREATMENT PLANT	3511	Flocculation	Particulate removal
TREATMENT PLANT	3511	Sedimentation	Particulate removal
TREATMENT PLANT	3511	Filtration, Rapid Sand	Particulate removal
TREATMENT PLANT	3511	Gaseous Chlorination, Post	Disinfection

1 - 7 of 7

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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