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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	ID5420058
PWS Name	TWIN FALLS CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	56121
County Served	Twin Falls

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, Regular	Nitrate Rule	Nitrate	4881	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	4872	Returned to Compliance	01-JUL-2022	-	No
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	4871	Returned to Compliance	01-JUL-2022	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	4874	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	4852	Returned to Compliance	17-FEB-2015	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrite	4870	Known	01-JAN-2014	31-DEC-2022	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4846	Returned to Compliance	12-JUL-2012	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4844	Returned to Compliance	05-MAY-2012	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4845	Returned to Compliance	05-MAY-2012	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4843	Returned to Compliance	01-APR-2012	30-JUN-2012	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4841	Returned to Compliance	03-MAR-2012	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4842	Returned to Compliance	03-MAR-2012	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4839	Returned to Compliance	02-JAN-2012	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4840	Returned to Compliance	02-JAN-2012	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4834	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4833	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4831	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4830	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4829	Returned to Compliance	01-JUL-2011	30-SEP-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4828	Returned to Compliance	01-JUL-2011	30-SEP-2011	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4824	Returned to Compliance	05-APR-2011	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4825	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4826	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4823	Returned to Compliance	01-JAN-2011	31-MAR-2011	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4822	Returned to Compliance	31-DEC-2010	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4821	Returned to Compliance	01-NOV-2010	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4820	Returned to Compliance	01-OCT-2010	31-DEC-2010	Yes
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	4817	Returned to Compliance	10-AUG-2010	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4818	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4815	Returned to Compliance	01-APR-2010	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4814	Returned to Compliance	01-JAN-2010	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4811	Returned to Compliance	01-JUL-2009	30-SEP-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4810	Returned to Compliance	01-JAN-2009	31-MAR-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4809	Returned to Compliance	01-OCT-2008	31-DEC-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4709	Returned to Compliance	01-JUL-2008	30-SEP-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4408	Returned to Compliance	01-APR-2008	30-JUN-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4308	Returned to Compliance	01-JAN-2008	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4108	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4208	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	4008	Returned to Compliance	01-JUL-2007	30-SEP-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	3907	Known	01-JUL-2007	31-JUL-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3807	Returned to Compliance	01-APR-2007	30-JUN-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3407	Returned to Compliance	01-JAN-2007	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3507	Returned to Compliance	01-JAN-2007	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3207	Returned to Compliance	01-OCT-2006	31-DEC-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3307	Returned to Compliance	01-OCT-2006	31-DEC-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3107	Returned to Compliance	01-JUL-2006	30-SEP-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	3006	Returned to Compliance	01-APR-2006	30-JUN-2006	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Arsenic Rule	Arsenic	2906	Returned to Compliance	01-JAN-2006	31-MAR-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	2806	Returned to Compliance	01-JAN-2006	31-MAR-2006	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
168389	4871	SOX	State Compliance achieved	11-DEC-2024	State	System has successfully completed most recent sampling round without any further incurred LCR violations and appear to be properly labeling their samples now and are legible for RTC.
168389	4872	SOX	State Compliance achieved	11-DEC-2024	State	System has successfully completed most recent sampling round without any further incurred LCR violations and appear to be properly labeling their samples now and are legible for RTC.
168388	4881	SOX	State Compliance achieved	11-DEC-2024	State	System completed Nitrate sample on Hankins on 06/23/2024. Please see EDMS Record ID2024ABR2995.
168388	4874	SOX	State Compliance achieved	11-DEC-2024	State	System completed Nitrate sample on Hankins on 06/23/2024. Please see EDMS Record ID2024ABR2995.
168383	4852	SOX	State Compliance achieved	16-NOV-2023	State	System has successfully completed additional rounds of monitoring since violation without further violations.
168376	4870	SIE	State Public Notification requested	25-FEB-2023	State	-
168364	4809	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4408	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4709	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4308	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4208	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4108	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	4008	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3807	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3507	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3407	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168363	4810	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4811	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4814	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4815	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4818	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4820	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4823	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4825	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4826	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4828	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4829	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4830	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4831	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4833	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4834	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168363	4843	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12/31/2012 running effectivelly
168364	2806	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	2906	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3006	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3107	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3207	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168364	3307	SOX	State Compliance achieved	25-MAR-2014	State	CAS closed 12-31-2012 system effectively running
168361	4846	SOX	State Compliance achieved	30-OCT-2012	State	-
168342	4842	SOX	State Compliance achieved	09-APR-2012	State	-
168344	4841	SOX	State Compliance achieved	09-APR-2012	State	-
168348	4840	SOX	State Compliance achieved	09-APR-2012	State	-
168346	4839	SOX	State Compliance achieved	09-APR-2012	State	-
168358	4845	SOX	State Compliance achieved	31-MAR-2012	State	-
168359	4844	SOX	State Compliance achieved	30-MAR-2012	State	-
168321	4817	SOX	State Compliance achieved	20-JUN-2011	State	sample collected 9/9/10 from source.
168355	4821	SOX	State Compliance achieved	25-APR-2011	State	-
168353	4822	SOX	State Compliance achieved	25-APR-2011	State	-
168350	4824	SOX	State Compliance achieved	25-APR-2011	State	-
168207	2406	SOX	State Compliance achieved	27-APR-2007	State	No missing samples in 2006

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
HANKINS #1 (SOUTH)	4376	Yes	Well	Ground water	Emergency	Inactive
WELL #3 OLD	4157	Yes	Well	Ground water	Permanent	Inactive
SOUTH WELL #4	4375	Yes	Well	Ground water	Permanent	Active
SOUTH WELL #3	2977	Yes	Well	Ground water	Permanent	Active
BLUE LAKES #4	2976	Yes	Well	Ground water	Permanent	Active
BLUE LAKES #3	2975	Yes	Well	Ground water	Permanent	Active
BLUE LAKES #2	2974	Yes	Well	Ground water	Permanent	Active
SOUTH WELL #2	2973	Yes	Well	Ground water	Permanent	Active
SOUTH WELL #1	2972	Yes	Well	Ground water	Permanent	Active
BLUE LAKES #1	2971	Yes	Well	Ground water	Permanent	Active
BLUE LAKES WELLFIELD	17693	Yes	Well	Ground water	Other	Inactive
WELL #5	14431	Yes	Well	Ground water	Other	Inactive
HANKINS #2 (NORTH)	4377	Yes	Well	Ground water	Emergency	Inactive
DISTRIBUTION SYSTEM	7457	No	Distribution System/Zone	-	-	Active
TOTAL STORAGE CAPACITY	9503	No	Other	-	-	Inactive
CANYON SPRINGS BOOSTER STATION	17375	No	Pump Facility	-	-	Active
HARRISON BOOSTER STATION	17376	No	Pump Facility	-	-	Active
WILLS BOOSTER STATION	17378	No	Pump Facility	-	-	Active
ELDRIDGE BOOSTER STATION	17379	No	Pump Facility	-	-	Active
HARRISON ARSENIC BLENDING STATION	17380	No	Pump Facility	-	-	Active
HANKINS BOOSTER STATION	17383	No	Pump Facility	-	-	Active
HARRISON TANK	17369	No	Storage	-	-	Active
SOUTH TANK #1	17370	No	Storage	-	-	Active
SOUTH TANK #2	17371	No	Storage	-	-	Active
HANKINS TANK #1	17372	No	Storage	-	-	Active
HANKINS TANK #2	17373	No	Storage	-	-	Active
ELDRIDGE TANK	17374	No	Storage	-	-	Active
MANIFOLD - SE HANKINS 1&2	11888	No	Transmission Main (Manifold)	-	-	Active
SOUTH TANKS MANIFOLD	5081	No	Transmission Main (Manifold)	-	-	Active
BLUE LAKES WELLFIELD TP	11050	No	Treatment Plant	-	-	Active
HANKINS TP	11051	No	Treatment Plant	-	-	Active
SOUTH WELLS TP	377	No	Treatment Plant	-	-	Active
BLUE LAKES #1 TP	374	No	Treatment Plant	-	-	Inactive
WELL #1 200HP TP	375	No	Treatment Plant	-	-	Inactive
WELL #2 75HP TP	376	No	Treatment Plant	-	-	Inactive
HARRISON MANIFOLD/ BLUE LAKES 1,2,3&4	5082	No	Wellhead	-	-	Active
SOUTH EAST RESERVOIR (WILLS)	5207	No	Wellhead	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BLUE LAKES WELLFIELD TP	11050	Innovative	Other
BLUE LAKES WELLFIELD TP	11050	Innovative	Disinfection
HANKINS TP	11051	Innovative	Other
HANKINS TP	11051	Innovative	Disinfection
SOUTH WELLS TP	377	Innovative	Other
SOUTH WELLS TP	377	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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