Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AK2260309
PWS Name	UNALASKA WATER SYSTEM
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	9400
County Served	Aleutians West Census Area

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	Total Haloacetic Acids (HAA5)	6774760	Known	01-OCT-2025	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	6774759	Known	01-OCT-2025	31-DEC-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	6774722	Returned to Compliance	01-MAY-2024	31-MAY-2024	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774723	Returned to Compliance	01-MAY-2024	31-MAY-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774724	Returned to Compliance	01-MAY-2024	31-MAY-2024	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	6774727	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)	6774726	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	6774725	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	6774721	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	6774720	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	6774718	Returned to Compliance	01-MAY-2022	31-MAY-2022	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774717	Returned to Compliance	01-MAY-2022	31-MAY-2022	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774719	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	6774715	Returned to Compliance	01-NOV-2021	30-NOV-2021	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	6774710	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774712	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774711	Returned to Compliance	01-APR-2018	30-JUN-2018	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	6774733	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	6774736	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	6774731	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	6774728	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	6774730	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	6774734	Known	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774697	Returned to Compliance	01-APR-2015	30-APR-2015	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774698	Returned to Compliance	01-APR-2015	30-APR-2015	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774696	Returned to Compliance	01-MAR-2015	31-MAR-2015	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774695	Returned to Compliance	01-JAN-2015	31-MAR-2015	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774692	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774691	Returned to Compliance	01-AUG-2014	31-AUG-2014	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774690	Returned to Compliance	01-AUG-2014	31-AUG-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774689	Returned to Compliance	01-JUL-2014	30-SEP-2014	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774686	Returned to Compliance	01-DEC-2012	31-DEC-2012	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774685	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774490	Returned to Compliance	01-DEC-2011	31-DEC-2011	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774257	Returned to Compliance	01-JUL-2010	31-JUL-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6774258	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774259	Returned to Compliance	01-JUL-2010	31-JUL-2010	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774256	Returned to Compliance	01-APR-2010	30-APR-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774249	Returned to Compliance	01-FEB-2010	28-FEB-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774250	Returned to Compliance	01-JAN-2010	31-JAN-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6774244	Returned to Compliance	01-DEC-2009	31-DEC-2009	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6774243	Returned to Compliance	01-DEC-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	6774251	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	6774252	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6769707	Returned to Compliance	01-AUG-2007	31-AUG-2007	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	6769507	Returned to Compliance	01-AUG-2007	31-AUG-2007	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6764504	Returned to Compliance	01-JAN-2004	31-JAN-2004	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6763804	Returned to Compliance	01-MAR-2003	31-MAR-2003	Yes
MR	Monitoring, Regular	Arsenic Rule	Arsenic	6764404	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	6763704	Returned to Compliance	01-JAN-2003	31-JAN-2003	Yes

1 - 50 of 299

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5322120	6774727	SOX	State Compliance achieved	21-APR-2025	State	PWS took nitrate sample. kp
5322107	6774725	SOX	State Compliance achieved	23-DEC-2024	State	RTC- PWS collected DBP samples in the correct quarter. kp
5322107	6774726	SOX	State Compliance achieved	23-DEC-2024	State	RTC- PWS collected DBP samples in the correct quarter. kp
5322095	6774722	SOX	State Compliance achieved	24-JUN-2024	State	RTC-PWS took 10 RT TC samples on time. kc
5322097	6774724	SOX	State Compliance achieved	24-JUN-2024	State	PWS took all RT TC samples & DS Cl. RTC. kc
5322096	6774723	SOX	State Compliance achieved	24-JUN-2024	State	RTC PWS took 10 TC samples with DS Cl reported on each. kc
5322089	6774720	SOX	State Compliance achieved	19-MAR-2024	State	PWS took RT TOC sample on time. RTC entered 4/4/24. kc
5322089	6774721	SOX	State Compliance achieved	19-MAR-2024	State	PWS took RT TOC sample on time. RTC entered 4/4/24. kc
5322055	6774715	SOX	State Compliance achieved	17-NOV-2022	State	RTC vio with appropriate number of TC samples submitted in December 2021. Original vio was rejected, validated on 11/17/22 and RTC'd on 11/17/22. hm
5322050	6774717	SOX	State Compliance achieved	14-JUL-2022	State	System took all required samples in the following month. RTC
5322050	6774718	SOX	State Compliance achieved	14-JUL-2022	State	System took all required samples in the following month. RTC
5322052	6774719	SOX	State Compliance achieved	01-JUN-2022	State	System took all required Chlorine samples for June, RTC. kc
5321996	6774710	SOX	State Compliance achieved	09-JUL-2018	State	RTC missed May TC sample with one taken in June 2018-CT
5322051	6774711	SOX	State Compliance achieved	01-JUN-2018	State	System took 10/10 TC & Cl residual samples. RTC. kc
5322081	6774712	SOX	State Compliance achieved	01-JUN-2018	State	PWS took appropriate amount DS Cl residuals -reported with monthly TCs. RTC entered 11/14/2023. kc
5321977	6774696	SOX	State Compliance achieved	31-MAY-2015	State	RTC violation from March 2015 due to missed taking chlorine residuals with monthly TC samples, and April 2015 for missing taking 2 of their TC samples also generating a viol 31 for thus missing 2 of the required chlorine residuals. Noticed when working with system on CCR that they had not been RTCd-CT 5/25/16
5321977	6774695	SOX	State Compliance achieved	31-MAY-2015	State	RTC violation from March 2015 due to missed taking chlorine residuals with monthly TC samples, and April 2015 for missing taking 2 of their TC samples also generating a viol 31 for thus missing 2 of the required chlorine residuals. Noticed when working with system on CCR that they had not been RTCd-CT 5/25/16
5321977	6774698	SOX	State Compliance achieved	31-MAY-2015	State	RTC violation from March 2015 due to missed taking chlorine residuals with monthly TC samples, and April 2015 for missing taking 2 of their TC samples also generating a viol 31 for thus missing 2 of the required chlorine residuals. Noticed when working with system on CCR that they had not been RTCd-CT 5/25/16
5321977	6774697	SOX	State Compliance achieved	31-MAY-2015	State	RTC violation from March 2015 due to missed taking chlorine residuals with monthly TC samples, and April 2015 for missing taking 2 of their TC samples also generating a viol 31 for thus missing 2 of the required chlorine residuals. Noticed when working with system on CCR that they had not been RTCd-CT 5/25/16
5322087	6774692	SOX	State Compliance achieved	01-JAN-2015	State	PWS took DS Cl for all TC samples. RTC entered 03/22/2024. kc
5321946	6774689	SOX	State Compliance achieved	10-OCT-2014	State	RTC'd August chlorine violations. Action date: 11/7/14 -AR
5321946	6774690	SOX	State Compliance achieved	10-OCT-2014	State	RTC'd August chlorine violations. Action date: 11/7/14 -AR
5321945	6774691	SOX	State Compliance achieved	22-SEP-2014	State	RTC'd August TCR violation. Action Date: 11/7/14 -AR
5321930	6774686	SOX	State Compliance achieved	28-JAN-2013	State	RTC'd TC/DSRD vios in December with January TC/DSRD sampling. Action taken 3/18/2013
5321930	6774685	SOX	State Compliance achieved	28-JAN-2013	State	RTC'd TC/DSRD vios in December with January TC/DSRD sampling. Action taken 3/18/2013
5321921	6774490	SOX	State Compliance achieved	31-JAN-2012	State	RTC'd EPRD vio 31 in Dec 2011with January 2012 operator report. Action taken 4/18/12
5321915	5308601	SOX	State Compliance achieved	18-NOV-2010	State	Entered Pb/Cu RTC per SNC comments 11/18/10
5321914	6769707	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774259	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	5022202	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6740197	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6763704	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6763804	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6764504	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6769507	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774243	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774244	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774249	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774250	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774256	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774257	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321914	6774258	SOX	State Compliance achieved	05-NOV-2010	State	System current on sampling for SWTR, TCR, and Stage one. RTC 11/05/2010.
5321912	6774251	SOX	State Compliance achieved	22-JUL-2010	State	System sampled for Nitrate. RTC'd violations 11/05/2010.
5321912	6774252	SOX	State Compliance achieved	22-JUL-2010	State	System sampled for Nitrate. RTC'd violations 11/05/2010.
5321105	6764404	SOX	State Compliance achieved	01-DEC-2004	State	Sampled for Arsenic 09/22/04, RTC'd taken 02/18/05.
5209702	5145102	SOX	State Compliance achieved	01-APR-2002	State	CLOSED: 04/01/2002*RTC FOR PES/SOC VIOLA
5209702	5148002	SOX	State Compliance achieved	01-APR-2002	State	CLOSED: 04/01/2002*RTC FOR PES/SOC VIOLA
5209702	5145302	SOX	State Compliance achieved	01-APR-2002	State	CLOSED: 04/01/2002*RTC FOR PES/SOC VIOLA
5209702	5145402	SOX	State Compliance achieved	01-APR-2002	State	CLOSED: 04/01/2002*RTC FOR PES/SOC VIOLA
5209702	5145502	SOX	State Compliance achieved	01-APR-2002	State	CLOSED: 04/01/2002*RTC FOR PES/SOC VIOLA

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
I-INTAKE 2 - EAST FORK UNALASKA CREEK	37373	Yes	Intake	Surface water	Other	Inactive
I-WL WELL 1	33486	Yes	Well	Ground water	Permanent	Inactive
WL WELL 3	46667	Yes	Well	Ground water	Permanent	Active
WL WELL 2	34562	Yes	Well	Ground water	Permanent	Active
WL WELL 1A	34210	Yes	Well	Ground water	Permanent	Active
I-WL WELL 2A	33072	Yes	Well	Ground water	Other	Inactive
I-INTAKE 5 - WEST FORK UNALASKA CREEK	36174	Yes	Intake	Surface water	Permanent	Inactive
IN INTAKE 6 - ICY CREEK RESERVOIR	37731	Yes	Intake	Surface water	Permanent	Active
DS DISTRIBUTION 1	40468	No	Distribution System/Zone	-	-	Active
SAMPLING STATION 1	41502	No	Sampling Station	-	-	Inactive
ST CONTACT TANK	30768	No	Storage	-	-	Active
ST LEAR ROAD STORAGE TANK	31692	No	Storage	-	-	Active
ST PYRAMID CREEK	31871	No	Storage	-	-	Inactive
TP FOR WELL 2 AND WELL 3	32069	No	Treatment Plant	-	-	Active
TP FOR WELL 1A	32307	No	Treatment Plant	-	-	Active
TP FOR ICY CREEK - PYRAMID VALLEY	32688	No	Treatment Plant	-	-	Active
I-TP FOR PYRAMID CREEK	32241	No	Treatment Plant	-	-	Inactive
I-TP ENTITY - WELLS	32306	No	Treatment Plant	-	-	Inactive
I-TP FOR WELL 1B	32587	No	Treatment Plant	-	-	Inactive
I-TP FOR WELL #2A	32588	No	Treatment Plant	-	-	Inactive
I-TP FOR UNALASKA VALLEY	32603	No	Treatment Plant	-	-	Inactive

1 - 21 of 21

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP FOR WELL 2 AND WELL 3	32069	Gaseous Chlorination, Post	Disinfection
TP FOR WELL 1A	32307	Gaseous Chlorination, Post	Disinfection
TP FOR ICY CREEK - PYRAMID VALLEY	32688	Ultraviolet Radiation	Disinfection by-products control
TP FOR ICY CREEK - PYRAMID VALLEY	32688	Hypochlorination, Post	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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