Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0159095
PWS Name	SILVERTHORNE TOWN OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	8400
County Served	Summit

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	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1008380	Returned to Compliance	01-JUL-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1008378	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1008379	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	1008377	Returned to Compliance	01-JAN-2020	31-DEC-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1008366	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1008365	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	1008364	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	1008363	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	1008362	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	1008361	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	1008360	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	1008359	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	1008358	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	1008357	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	1008356	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	1008355	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	1008354	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	1008353	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	1008352	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	1008351	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	1008350	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	1008349	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	1008348	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	1008347	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	1008346	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	1008375	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	1008374	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	1008376	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	1008372	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	1008371	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	1008370	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	1008369	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	1008368	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	1008373	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	1008367	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	1008207	Returned to Compliance	01-JUL-2007	31-JUL-2007	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1008106	Returned to Compliance	01-JUL-2005	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	1008269	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	1008294	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	1008325	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	1008263	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1008324	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1008293	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1008262	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1008323	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1008261	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1008292	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	1008322	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	1008291	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	1008260	Returned to Compliance	01-JAN-2005	31-DEC-2007	No

1 - 50 of 131

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
1027936	1008378	SOX	State Compliance achieved	25-AUG-2025	State	System collected next required routine sampling in 2025 lmf 11/3/2025
1027936	1008379	SOX	State Compliance achieved	25-AUG-2025	State	System collected next required routine sampling in 2025 lmf 11/3/2025
1027935	1008380	SOX	State Compliance achieved	15-JUL-2025	State	System submitted CCR/COD on 7/15/2025 lmf 7/15/2025
1027930	1008377	SOX	State Compliance achieved	09-JUN-2021	State	System RTCd with sample in correct quarter. AS:
1027927	1008351	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008352	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008353	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008354	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008355	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008356	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008357	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008358	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008359	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008360	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008361	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008362	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008363	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008364	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008365	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008366	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008367	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008368	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008369	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008370	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008371	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008372	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008373	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008374	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008375	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008376	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008350	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008349	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008348	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008346	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027927	1008347	SOX	State Compliance achieved	18-FEB-2014	State	Compliant Samples recd.
1027922	1008242	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008243	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008244	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008245	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008246	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008247	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008248	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008249	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008250	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008251	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008252	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008253	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008254	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008255	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj
1027922	1008256	SOX	State Compliance achieved	14-MAY-2009	State	SOC EO 001,002 and 003 Sampled as required in 2008. 5/14/09 dgj

1 - 50 of 131

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL A	10378	Yes	Well	Ground water	Permanent	Active
WELL 6	17680	Yes	Well	Ground water	Permanent	Active
WELL 5	17679	Yes	Well	Ground water	Permanent	Active
WELL F	10383	Yes	Well	Ground water	Permanent	Active
WELL E	10382	Yes	Well	Ground water	Permanent	Active
WELL D	10381	Yes	Well	Ground water	Permanent	Active
WELL C	10380	Yes	Well	Ground water	Permanent	Active
WELL B	10379	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	7243	No	Distribution System/Zone	-	-	Active
PTARMIGAN TANK	13240	No	Storage	-	-	Active
THREE PEAKS ZONE STORAGE TANK	17674	No	Storage	-	-	Active
CURRANT WAY STORAGE TANK	17675	No	Storage	-	-	Active
RUBY STORAGE TANK	17676	No	Storage	-	-	Active
ANGLER MOUNTAIN RANCH TANK	21185	No	Storage	-	-	Active
SUMMIT SKY RANCH STORAGE TANK	22012	No	Storage	-	-	Active
EAGLES NEST TANK	13241	No	Storage	-	-	Inactive
EAGLES NEST TANK	13242	No	Storage	-	-	Inactive
BIG HORN PUMP AND TREATMENT FACILITY	17677	No	Treatment Plant	-	-	Active
WILLOWCREEK HIGHLANDS TREATMENT AND PUMP	17678	No	Treatment Plant	-	-	Active
RAINBOW WTP	4502	No	Treatment Plant	-	-	Active
BRIAN WTP	4503	No	Treatment Plant	-	-	Active
EAGLES NEST WTP	4504	No	Treatment Plant	-	-	Active

1 - 22 of 22

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BIG HORN PUMP AND TREATMENT FACILITY	17677	Hypochlorination, Post	Disinfection
BIG HORN PUMP AND TREATMENT FACILITY	17677	Ultraviolet Radiation	Disinfection
BIG HORN PUMP AND TREATMENT FACILITY	17677	Fluoridation	Other
BIG HORN PUMP AND TREATMENT FACILITY	17677	Inhibitor, Polyphosphate	Corrosion control
WILLOWCREEK HIGHLANDS TREATMENT AND PUMP	17678	Hypochlorination, Post	Disinfection
RAINBOW WTP	4502	Fluoridation	Other
RAINBOW WTP	4502	Hypochlorination, Post	Disinfection
RAINBOW WTP	4502	Innovative	Disinfection
RAINBOW WTP	4502	Innovative	Corrosion control
BRIAN WTP	4503	Fluoridation	Other
BRIAN WTP	4503	Innovative	Disinfection
BRIAN WTP	4503	Inhibitor, Polyphosphate	Corrosion control
BRIAN WTP	4503	Hypochlorination, Post	Disinfection
EAGLES NEST WTP	4504	Fluoridation	Other
EAGLES NEST WTP	4504	Innovative	Disinfection
EAGLES NEST WTP	4504	Inhibitor, Polyphosphate	Corrosion control
EAGLES NEST WTP	4504	Hypochlorination, Post	Disinfection

1 - 17 of 17

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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