Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MT0000158
PWS Name	BOULDER CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	1400
County Served	Jefferson

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	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1240309	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)	1240310	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
TT	Failure to Filter (SWTR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1240307	Returned to Compliance	01-JUL-2022	-	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1240299	Returned to Compliance	01-SEP-2018	30-SEP-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1240294	Returned to Compliance	01-SEP-2014	31-AUG-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1240293	Returned to Compliance	01-SEP-2014	31-AUG-2015	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1240267	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1240291	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	1240281	Known	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1240263	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1240284	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1240273	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1240290	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1240279	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1240269	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	1240278	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	1240268	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	1240289	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1240277	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1240288	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1240271	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1240282	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1240261	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1240262	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1240272	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1240283	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	1240264	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	1240274	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	1240285	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1240265	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1240275	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1240286	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	1240266	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	1240287	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	1240276	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1240270	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1240280	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1229607	Returned to Compliance	01-JAN-2007	30-JUN-2007	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1229106	Returned to Compliance	01-SEP-2006	30-SEP-2006	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1229407	Returned to Compliance	01-JUL-2006	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1230607	Returned to Compliance	01-JUL-2006	31-DEC-2006	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	1232108	Returned to Compliance	01-JUN-2006	-	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1230107	Returned to Compliance	01-JAN-2006	30-JUN-2006	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1229006	Returned to Compliance	01-OCT-2005	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1228405	Returned to Compliance	01-FEB-2005	28-FEB-2005	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1228505	Returned to Compliance	01-JAN-2005	30-JUN-2005	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1228605	Returned to Compliance	01-JAN-2005	30-JUN-2005	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1228105	Returned to Compliance	01-OCT-2004	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1223605	Returned to Compliance	01-JUL-2004	31-DEC-2004	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1228205	Returned to Compliance	01-JUL-2004	-	No

1 - 50 of 87

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5525879	1240309	SOX	State Compliance achieved	23-JAN-2025	State	Sampled 08/14/2025-PMT 9/17/2025
5525879	1240310	SOX	State Compliance achieved	23-JAN-2025	State	Sampled 08/14/2025-PMT 9/17/2025
5525871	1240307	SOX	State Compliance achieved	28-JUL-2022	State	FTF, WL004 still connected to system. WL004 was determined to be GWUDISW. 7/28/2022 JRS. WL004 was disconnected from the system on 10/19/2022. JRS
5525846	1240299	SIE	State Public Notification requested	15-OCT-2018	State	-
5525829	1240289	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240290	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240286	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240284	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240285	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240288	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240287	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240282	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240283	SOX	State Compliance achieved	03-NOV-2016	State	-
5525829	1240291	SOX	State Compliance achieved	03-NOV-2016	State	-
5525823	1240276	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240277	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240278	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240279	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240280	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240275	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240274	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240273	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240272	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240270	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240269	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240268	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240267	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240266	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240265	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240264	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240263	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240262	SOX	State Compliance achieved	25-OCT-2016	State	-
5525819	1240261	SOX	State Compliance achieved	25-OCT-2016	State	-
5525823	1240271	SOX	State Compliance achieved	25-OCT-2016	State	-
5525832	1240294	SOX	State Compliance achieved	09-AUG-2016	State	-
5525832	1240293	SOX	State Compliance achieved	09-AUG-2016	State	-
5525820	1240281	SIF	State Public Notification received	15-JAN-2015	State	-
5525811	1232108	SIF	State Public Notification received	12-OCT-2010	State	Required to submit public notice qurterly as part of AO. Submitted on 3/12/10, 6/1/10, 10/7/2010. MJT 10/12/10
5525209	100	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525209	901	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525209	1221403	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525209	1228405	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525209	1229106	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525209	1220098	SOX	State Compliance achieved	28-NOV-2008	State	6mo no MCL or MR violations. 11/28/2008 SWP
5525309	1220802	SOX	State Compliance achieved	20-MAY-2008	State	-
5525309	1220902	SOX	State Compliance achieved	20-MAY-2008	State	-
5525309	1223105	SOX	State Compliance achieved	20-MAY-2008	State	-
5525309	1223605	SOX	State Compliance achieved	20-MAY-2008	State	-
5525309	1224105	SOX	State Compliance achieved	20-MAY-2008	State	-
5525309	1224605	SOX	State Compliance achieved	20-MAY-2008	State	-

1 - 50 of 87

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 6 GWIC 335218	24904	Yes	Well	Ground water	Permanent	Active
WELL 5 IRRIGATION	6444	Yes	Well	Ground water	Seasonal	Inactive
WELL 4 GWIC 53406	6157	Yes	Well	Ground water	Permanent	Inactive
WELL 3 GWIC 53405	7407	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
WELL 1 GWIC 53385	5938	Yes	Well	Ground water	Permanent	Active
WELL 2 GWIC 53389	5802	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	8757	No	Distribution System/Zone	-	-	Active
STORAGE FACILITY 2 500,000 GAL	12352	No	Storage	-	-	Active
STORAGE FACILITY 1 75,000 GAL	1946	No	Storage	-	-	Active
TREATMENT PLANT FOR WELL 1	19242	No	Treatment Plant	-	-	Active
EMERG TEMP TP FOR WELL 2	23989	No	Treatment Plant	-	-	Active
TP FOR WELL 6	24906	No	Treatment Plant	-	-	Active
TREATMENT PLANT TEMP CORROSION CTL	18465	No	Treatment Plant	-	-	Inactive
TREATMENT PLANT FOR WELL 3	19243	No	Treatment Plant	-	-	Inactive

1 - 14 of 14

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT TEMP CORROSION CTL	18465	Inhibitor, Orthophosphate	Corrosion control
TREATMENT PLANT TEMP CORROSION CTL	18465	Hypochlorination, Post	Disinfection
TREATMENT PLANT FOR WELL 1	19242	Inhibitor, Orthophosphate	Corrosion control
TREATMENT PLANT FOR WELL 1	19242	Hypochlorination, Post	Disinfection
TREATMENT PLANT FOR WELL 3	19243	Inhibitor, Orthophosphate	Corrosion control
TREATMENT PLANT FOR WELL 3	19243	Hypochlorination, Post	Disinfection
EMERG TEMP TP FOR WELL 2	23989	Inhibitor, Orthophosphate	Corrosion control
EMERG TEMP TP FOR WELL 2	23989	Hypochlorination, Post	Disinfection
TP FOR WELL 6	24906	Hypochlorination, Post	Disinfection
TP FOR WELL 6	24906	Innovative	Disinfection
TP FOR WELL 6	24906	Inhibitor, Orthophosphate	Corrosion control

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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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