GPA, GWA partner with CISA on Critical Infrastructure Security
"CISA supports Guam's utilities by providing tactical advisers, specialized training and emergency preparedness to assist in times of crisis," GPA said.
By Jolene Toves ·
Water & GWA
Every GNN story about the Guam Waterworks Authority, a water outage or a boil-water notice, newest first.
20 stories · most recent September 23, 2026
Latest
198 customers remain without water as GWA restores service
As of 9 p.m. July 17, 198 Guam Waterworks Authority (GWA) customers remained without water service out of 43,643 total customers.
Waterworks lifts conservation measures as service returns
The Guam Waterworks Authority (GWA) has rescinded conservation compliance measures implemented July 6 as the agency continues work to restore water service to customers across the island.
By Jolene Toves ·
About 1,947 customers still without water after typhoon
As of 8 p.m. Sunday, the Guam Waterworks Authority (GWA) estimated roughly 1,947 customers remained without water service as post-typhoon recovery efforts continue to restore reservoir levels and system pressure.
By Jolene Toves ·
Waterworks reports 80 wells back online
As of 2 p.m. Friday, the Guam Waterworks Authority (GWA) reported 80 wells online, with 27 running on the island-wide power system and 53 on generator power.
By Jolene Toves ·
Waterworks reports 73 wells online on generator power
The Guam Waterworks Authority reported 73 wells and the Ugum Surface Water Treatment Plant were online on generator power as of 8 p.m. Tuesday, though some villages are experiencing low to no water pressure.
Waterworks completes storm mitigation ahead of Bavi
Ahead of the Bavi’s passage the Guam Waterworks Authority (GWA) worked to complete storm mitigation work on the island’s water and wastewater systems while also urging the community to conserve and prepare water reserves at their home.
By Jolene Toves ·
Waterworks earns clean audit for 13th straight year
The Guam Waterworks Authority has received an unmodified audit opinion for the thirteenth consecutive year, with independent auditor Ernst & Young LLP finding no significant deficiencies in its fiscal 2025 financial statements.
Waterworks lifts boil water notice islandwide
The Guam Waterworks Authority has rescinded its precautionary boil water notice and lifted water conservation measures island-wide as recovery efforts from Super Typhoon Sinlaku near completion, the authority announced Saturday.
Four deep wells offline as power fluctuates
The Guam Waterworks Authority reported Tuesday morning that four deep wells have gone offline due to power fluctuations caused by Super Typhoon Sinlaku, resulting in low to no water pressure in parts of Dededo and Barrigada.
Waterworks prepares systems and urges conservation
The Guam Waterworks Authority is preparing water and wastewater systems ahead of Tropical Storm Sinlaku, urging residents to conserve water and secure supplies as conditions worsen.
Boil water advisory hits parts of GWA's northern system
Residents in parts of the Guam Waterworks Authority’s Northern System are under a boil water advisory after tests detected fecal coliform and Escherichia coli bacteria in the water supply on Dec. 1, 2025.
Guam EPA lifts do-not-drink advisory for Well Y-15
The Guam Environmental Protection Agency has lifted its “Do Not Drink Without Treatment” advisory for dieldrin contamination at Guam Waterworks Authority Production Well Y-15 after four consecutive weeks of sampling showed no detectable levels of the banned pesticide.
Bottled water handouts end as Y-15 tests come back clean
The Guam Waterworks Authority (GWA) announced Monday that courtesy bottled water distribution for Santa Rosa and Yigo area customers will end Wednesday, November 12, after four consecutive weeks of clean test results from Well Y-15 confirmed the water is safe to drink.
GWA: treatment system clearing dieldrin from Y-15 supply
The Guam Waterworks Authority (GWA) announced Friday that multiple test results confirm the effectiveness of its Y-15 treatment system in removing dieldrin contamination from the Santa Rosa/Yigo water supply.
Third straight week of clean tests at Yigo's Y-15 well
For the third week in a row, tests show no detection of dieldrin at Guam Waterworks Authority’s (GWA) Y-15 well in Yigo, confirming that the interim treatment system has effectively removed the contaminant.
Governor asks high court to settle AG contract powers
Governor Lou Leon Guerrero has filed a petition with the Supreme Court of Guam seeking a declaratory judgment that the Attorney General does not have the authority to approve contracts for autonomous agencies such as the Guam Power Authority (GPA) and Guam Waterworks Authority (GWA).
Waterworks completes interim treatment at Yigo well Y-15
The Guam Waterworks Authority (GWA) has completed installation of an interim treatment system at well Y-15 in Yigo, marking a key milestone toward lifting the “Do Not Drink without Treatment” advisory issued earlier this year.
Yigo families give notice of intent to sue over well contamination
Several families in Yigo have issued a formal notice of intent to sue the Guam Environmental Protection Agency (GEPA) and Guam Waterworks Authority (GWA), demanding immediate action to address dangerous levels of dieldrin, a pesticide…
Waterworks issues health advisory to 1,112 Yigo customers
The Guam Waterworks Authority (GWA) issued Tier 1 health advisory notices to 1,112 customers in Yigo after detecting dieldrin levels above Guam Environmental Protection Agency’s Interim Action Level.
