Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	GU0000003
PWS Name	GWA CENTRAL WATER SYSTEM
PWS Type	Community water system
Owner Type	State or Territorial Government
Primary Source	Surface water purchased
Primacy Type	Territory
Is Wholesaler?	Yes
Population Served	21398
County Served	Guam

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
MCL	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	132	Returned to Compliance	01-APR-2022	30-APR-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	126	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R027	Returned to Compliance	01-JAN-2012	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	114	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	115	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	107	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	108	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	109	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	111	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	112	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	116	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	110	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	113	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	131	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R026	Returned to Compliance	01-OCT-2011	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	125	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	130	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	117	Known	01-JUL-2011	31-JUL-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	124	Returned to Compliance	01-JUL-2011	30-SEP-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	129	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	#R025	Returned to Compliance	01-JUL-2011	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R024	Returned to Compliance	01-APR-2011	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	123	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R023	Returned to Compliance	01-JAN-2011	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	122	Returned to Compliance	01-JAN-2011	31-MAR-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	121	Returned to Compliance	01-OCT-2010	31-DEC-2010	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R022	Returned to Compliance	01-OCT-2010	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	120	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R021	Returned to Compliance	01-JUL-2010	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	#R020	Returned to Compliance	01-APR-2010	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	128	Returned to Compliance	01-APR-2010	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	119	Returned to Compliance	01-APR-2010	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	118	Returned to Compliance	01-JAN-2010	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	127	Returned to Compliance	01-JAN-2010	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	104	Known	01-JAN-2004	31-JAN-2004	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1V93	Returned to Compliance	01-JUL-1992	-	No
Other	Notification, Public	Miscellaneous Other Rules	-	5980	Known	14-AUG-1980	13-SEP-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	1680	Known	14-DEC-1979	13-JAN-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	780	Known	14-NOV-1979	13-DEC-1979	No

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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
344	132	SOX	State Compliance achieved	28-APR-2022	State	-
#338	124	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	129	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	128	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	127	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	126	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	125	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	118	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	119	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	120	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	121	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	122	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	123	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	131	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
#338	130	EOX	Federal Compliance achieved	06-NOV-2014	ODSWeb	Per e-mail message from Angel Marquez (GEPA) forwarded by Jason on 11/25/2014, all Guam water systems are now back in compliance on all DBP violations.
9999900000000000001	#R027	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R026	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R025	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R024	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R023	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R022	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R020	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
9999900000000000001	#R021	EOX	Federal Compliance achieved	28-MAY-2014	ODSWeb	PN violations RTCd per 2/18/20 e-mail from J. Mendoza, based on copy of memo specifying delivery date of 2013 CCR attached to 2/17/20 message from J. Mendoza. EO+ might be more accurate coding but I used EOX to deduct the ETT points.
309	117	SIE	State Public Notification requested	03-OCT-2013	State	-
306	108	SIE	State Public Notification requested	06-MAY-2013	State	-
306	109	SIE	State Public Notification requested	06-MAY-2013	State	-
306	110	SIE	State Public Notification requested	06-MAY-2013	State	-
306	111	SIE	State Public Notification requested	06-MAY-2013	State	-
306	112	SIE	State Public Notification requested	06-MAY-2013	State	-
306	114	SIE	State Public Notification requested	06-MAY-2013	State	-
306	115	SIE	State Public Notification requested	06-MAY-2013	State	-
306	116	SIE	State Public Notification requested	06-MAY-2013	State	-
306	107	SIE	State Public Notification requested	06-MAY-2013	State	-
306	113	SIE	State Public Notification requested	06-MAY-2013	State	-
104	104	SFH	State Boil Water Order	29-JAN-2004	State	-
9999900000000000002	1V93	SOX	State Compliance achieved	01-JAN-2003	ODSWeb	1993 LCR type 51 initial tap sampling violation no longer in SDWIS/State per J. Mendoza. RTC based on two 6-month sampling periods in 2002 with sample results in SDWIS/Fed.

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CONSECUTIVE CONNECTION FROM U.S. NAVY	292	Yes	Consecutive Connection	Surface water	Permanent	Active
ASAN SPRING	382	Yes	Spring	Ground water under the influence of surface water	Permanent	Inactive
SANTA RITA SPRING	375	Yes	Spring	Ground water under the influence of surface water	Permanent	Active
DISTRIBUTION SYSTEM	374	No	Distribution System/Zone	-	-	Active
SANTA RITA SPRINGS	554	No	Pump Facility	-	-	Active
SANTA ANA LOWER	555	No	Pump Facility	-	-	Active
NIMITZ HILL	556	No	Pump Facility	-	-	Active
SANTA ANA LOWER RESERVOIR (AGAT 1) 1MG	552	No	Storage	-	-	Active
SANTA ANA UPPER RESERVOIR (AGAT 2 TANK)	553	No	Storage	-	-	Active
NIMITZ HILL (UPPER)	578	No	Storage	-	-	Active
SANTA RITA RESERVOIR (PRODUCT) 1MG	551	No	Storage	-	-	Inactive
TP FOR SANTA RITA SPRING	291	No	Treatment Plant	-	-	Active
TP FOR ASAN SPRING	290	No	Treatment Plant	-	-	Inactive
FENA WATER TREATMENT PLANT	373	No	Treatment Plant	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP FOR ASAN SPRING	290	Gaseous Chlorination, Post	Disinfection
TP FOR SANTA RITA SPRING	291	Gaseous Chlorination, Post	Disinfection
FENA WATER TREATMENT PLANT	373	Hypochlorination, Pre	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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