Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	WY5600202
PWS Name	DAYTON, TOWN OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	824
County Served	Sheridan

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	Failure Submit Filter Profile/CPE Report	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4001224	Known	01-JUL-2023	31-JUL-2023	No
MR	Failure Submit Filter Profile/CPE Report	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4001223	Known	01-MAY-2023	31-MAY-2023	No
MR	Failure Submit Filter Profile/CPE Report	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4001222	Known	01-APR-2023	30-APR-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4001219	Returned to Compliance	01-JAN-2014	31-MAR-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4001220	Returned to Compliance	01-JAN-2014	31-MAR-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4001216	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4001217	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4001212	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4001213	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4001210	Returned to Compliance	01-APR-2009	30-JUN-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4001209	Returned to Compliance	01-APR-2009	30-JUN-2009	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4001208	Returned to Compliance	01-FEB-2009	28-FEB-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4001207	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4001107	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4001006	Known	01-JUL-2006	31-JUL-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4000806	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4000706	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	4000906	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4000604	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	199	Known	01-JUN-1999	30-JUN-1999	Yes
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	31300	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	30500	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	30800	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	30400	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	31700	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	30300	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	30600	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	30200	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	31000	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	30700	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	32100	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	31500	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	31200	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	30100	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	31600	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	31100	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	31400	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	32000	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	31800	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	31900	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	30900	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	298	Known	01-MAY-1998	31-MAY-1998	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	198	Known	01-MAY-1998	31-MAY-1998	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	197	Known	01-MAY-1997	31-MAY-1997	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	4000394	Known	01-APR-1994	30-JUN-1994	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	4000294	Known	01-JAN-1994	31-MAR-1994	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	4000194	Known	01-OCT-1993	31-DEC-1993	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	594	Known	01-JUL-1993	30-SEP-1993	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	292	Known	30-JAN-1992	29-FEB-1992	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	1644780	Known	01-JUL-1976	30-JUN-1980	No

1 - 50 of 51

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
70121	4001222	SIF	State Public Notification received	16-JUL-2025	Region	Received public notification and certification of distribution from the system operator. 7/16/2025. jc
70121	4001223	SIF	State Public Notification received	16-JUL-2025	Region	Received public notification and certification of distribution from the system operator. 7/16/2025. jc
70121	4001224	SIF	State Public Notification received	16-JUL-2025	Region	Received public notification and certification of distribution from the system operator. 7/16/2025. jc
70116	4001219	SOX	State Compliance achieved	29-AUG-2014	Region	-
70116	4001220	SOX	State Compliance achieved	29-AUG-2014	Region	-
70115	4001212	SOX	State Compliance achieved	19-AUG-2014	Region	-
70115	4001217	SOX	State Compliance achieved	19-AUG-2014	Region	-
70115	4001216	SOX	State Compliance achieved	19-AUG-2014	Region	-
70115	4001213	SOX	State Compliance achieved	19-AUG-2014	Region	-
70108	4001209	SOX	State Compliance achieved	23-JUL-2010	Region	-
70108	4001210	SOX	State Compliance achieved	23-JUL-2010	Region	-
70114	4001208	SOX	State Compliance achieved	01-APR-2009	Region	Data received late. BB
70007	4001207	SOX	State Compliance achieved	27-JUL-2007	Region	-
70007	4001107	SOX	State Compliance achieved	27-JUL-2007	Region	-
70007	4000604	SOX	State Compliance achieved	27-JUL-2007	Region	-
69706	4000906	SOX	State Compliance achieved	12-APR-2006	Region	-
69506	4000806	SOX	State Compliance achieved	01-FEB-2006	Region	System FTM for TTHM/HAA5 monitoring period 07/01/2005- 09/30/2005
69506	4000706	SOX	State Compliance achieved	01-FEB-2006	Region	System FTM for TTHM/HAA5 monitoring period 07/01/2005- 09/30/2005
69100	31600	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31700	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31800	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31900	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	32000	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	32100	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30200	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31500	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31400	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31300	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31200	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31100	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	31000	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30900	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30800	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30700	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30600	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30500	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30100	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30300	SOX	State Compliance achieved	01-FEB-2000	Region	-
69100	30400	SOX	State Compliance achieved	01-FEB-2000	Region	-

1 - 39 of 39

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
TONGUE RIVER INTAKE	12377	Yes	Intake	Surface water	Permanent	Active
DAYTON WELL #1	18175	Yes	Well	Ground water	Permanent	Active
CLEARWELL (119K-GAL.)	20277	No	Clear Well	-	-	Active
DAYTON, TOWN OF	12378	No	Distribution System/Zone	-	-	Active
DAYTON, TOWN OF	10888	No	Other	-	-	Inactive
RAW WATER WELL PUMPS	16062	No	Pump Facility	-	-	Inactive
STORAGE TANK (252K-GAL)	16063	No	Storage	-	-	Active
TREATMENT PLANT	15256	No	Treatment Plant	-	-	Active
CHLORINATED AT WELLHEAD	18505	No	Treatment Plant	-	-	Inactive

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	15256	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT	15256	Coagulation	Particulate removal
TREATMENT PLANT	15256	Filtration, Rapid Sand	Particulate removal
CHLORINATED AT WELLHEAD	18505	Gaseous Chlorination, Post	Disinfection
CHLORINATED AT WELLHEAD	18505	Hypochlorination, Post	Disinfection

1 - 5 of 5

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.

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Nav Menu

Your Drinking Water Query results from SDWIS Fed Reporting Services

Note

PWS Violation

Violations

Column Actions

Enforcement Actions

Enforcement Actions

Column Actions

PWS Facilities

All Facilities

Column Actions

PWS Treatment Processes

Treatment Processes

Column Actions