Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MT0000195
PWS Name	DARBY TOWN OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	850
County Served	Ravalli

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
TT	OCCT/SOWT Treatment Installation/Demonstration	Lead and Copper Rule	Lead and Copper Rule	1434762	Returned to Compliance	06-AUG-2024	-	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1434760	Returned to Compliance	01-MAY-2023	31-MAY-2023	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1434759	Returned to Compliance	01-JUL-2021	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1434757	Returned to Compliance	01-JUL-2017	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	1434732	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1434733	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1430307	Returned to Compliance	01-JUL-2006	31-DEC-2006	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1429807	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	1429606	Returned to Compliance	01-OCT-2005	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1429505	Returned to Compliance	01-SEP-2005	30-SEP-2005	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	1429205	Returned to Compliance	01-SEP-2005	30-SEP-2005	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1429105	Returned to Compliance	01-AUG-2005	31-AUG-2005	Yes
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	1429707	Returned to Compliance	01-JAN-2005	-	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1428505	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	1428105	Open	01-OCT-2004	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1422804	Returned to Compliance	01-SEP-2004	30-SEP-2004	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1422704	Returned to Compliance	01-JUL-2004	31-JUL-2004	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1423605	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	1428205	Returned to Compliance	01-JUL-2004	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1423105	Returned to Compliance	01-JAN-2004	30-JUN-2004	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1421804	Returned to Compliance	01-OCT-2003	-	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1421904	Returned to Compliance	01-JUL-2003	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1424105	Returned to Compliance	01-JUL-2003	31-DEC-2003	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1424605	Returned to Compliance	01-JAN-2003	30-JUN-2003	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1422004	Returned to Compliance	01-OCT-2002	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1421302	Returned to Compliance	01-AUG-2002	31-AUG-2002	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1425105	Returned to Compliance	01-JUL-2002	31-DEC-2002	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1422104	Returned to Compliance	01-JUL-2002	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1421102	Returned to Compliance	01-JUL-2002	31-JUL-2002	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1425605	Returned to Compliance	01-JAN-2002	30-JUN-2002	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1422204	Returned to Compliance	01-OCT-2001	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426405	Returned to Compliance	01-JUL-2001	31-DEC-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426105	Returned to Compliance	01-JUL-2001	31-DEC-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426205	Returned to Compliance	01-JUL-2001	31-DEC-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426505	Returned to Compliance	01-JUL-2001	31-DEC-2001	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1422304	Returned to Compliance	01-JUL-2001	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426305	Returned to Compliance	01-JUL-2001	31-DEC-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426705	Returned to Compliance	01-JAN-2001	30-JUN-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426605	Returned to Compliance	01-JAN-2001	30-JUN-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426905	Returned to Compliance	01-JAN-2001	30-JUN-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427005	Returned to Compliance	01-JAN-2001	30-JUN-2001	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1426805	Returned to Compliance	01-JAN-2001	30-JUN-2001	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1428305	Returned to Compliance	01-OCT-2000	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427405	Returned to Compliance	01-JUL-2000	31-DEC-2000	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427105	Returned to Compliance	01-JUL-2000	31-DEC-2000	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427305	Returned to Compliance	01-JUL-2000	31-DEC-2000	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427205	Returned to Compliance	01-JUL-2000	31-DEC-2000	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1427505	Returned to Compliance	01-JUL-2000	31-DEC-2000	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1428405	Returned to Compliance	01-JUL-2000	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	100	Returned to Compliance	01-JUN-2000	30-JUN-2000	Yes

1 - 50 of 183

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5644953	1434762	SOX	State Compliance achieved	08-JAN-2026	State	Orthophosphate data consistent with historical results, SOXing violation - JD 01/08/2026
5644944	1434760	SIE	State Public Notification requested	19-JUN-2023	State	-
5644942	1434759	SOX	State Compliance achieved	26-JUL-2021	State	7/28/2021 2020 CCR submitted 7/26/2021, SJP;
5644936	1434757	SOX	State Compliance achieved	27-JUL-2017	State	7/27/2017 CCR received, SJP;
5644921	1434732	SIE	State Public Notification requested	19-OCT-2010	State	-
5644919	1434733	SIE	State Public Notification requested	19-OCT-2010	State	-
5644909	100	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1429105	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1429205	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1429505	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1421302	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1422704	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	25697	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	253992	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	474798	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1020298	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1422804	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1421102	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644909	1024999	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5644808	1427505	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427605	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427705	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427805	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427905	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1428005	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1428505	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1429807	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1430307	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427405	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427305	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427205	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427005	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426905	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426805	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426705	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426605	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426505	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426405	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426305	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426205	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1426105	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1425605	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1425105	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1424605	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1424105	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1423605	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1423105	SOX	State Compliance achieved	05-JUN-2008	State	-
5644808	1427105	SOX	State Compliance achieved	05-JUN-2008	State	-
5644607	1429707	SOX	State Compliance achieved	05-JUL-2007	State	Submitted OCCT.
5643607	1429606	SIF	State Public Notification received	02-APR-2007	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 3 DARBY LUMBER EMERGENCY	4133	Yes	Well	Ground water	Emergency	Inactive
WELL 4 SOUTH WATER ST	4650	Yes	Well	Ground water	Permanent	Inactive
WELL 1 FIRE DEPT	3396	Yes	Well	Ground water	Permanent	Inactive
WELL 2 GWIC 50709	3397	Yes	Well	Ground water	Permanent	Active
WELL 6 GWIC 252042	18547	Yes	Well	Ground water	Permanent	Active
WELL 5 GWIC 185827	18525	Yes	Well	Ground water	Permanent	Active
CH FOR WELLS 2, 5,6	19694	No	Common Headers	-	-	Active
DISTRIBUTION SYSTEM	10128	No	Distribution System/Zone	-	-	Active
STORAGE FACILITY 2	19693	No	Storage	-	-	Active
STORAGE FACILITY	650	No	Storage	-	-	Inactive
TRANSMISSION MAIN	20497	No	Transmission Main (Manifold)	-	-	Active
TREATMENT PLANT	18332	No	Treatment Plant	-	-	Active

1 - 12 of 12

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	18332	Hypochlorination, Post	Disinfection
TREATMENT PLANT	18332	Inhibitor, Orthophosphate	Corrosion control
TREATMENT PLANT	18332	Innovative	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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