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(Mangilao, GU)  — On Oct. 12, the Guam Waterworks Authority (GWA) completed the successful installation of its interim treatment system...

Application forms available online. Review the FAQ's provided below to help you select the correct application form to submit to GWA....

Affected residents in Yigo/Santa Rosa may visit GWA's newest flexitank filling station on Chalan Emsley with their containers to obtain...

GWA's Surface and Springs Unit recently performed the annual replacement of Granular Activated Carbon (GAC) filters at the Tumon Maui Well. This same type of filtration treatment will be installed at other well sites to filter dieldrin and other contaminants found in the groundwater.

As of October 5, 2025, no boil water notice for Yigo and Mangilao has been issued by Guam Waterworks Authority (GWA) or Guam...

Affected residents in YIGO who safe water supply may visit any of these water outposts serviced by GWA emergy crews.

Mayors' Council of Guam Regular Monthly Meeting - October 1, 2025

GWA in coordination with the Yigo Mayor's office will be providing limited supplies of bottled water to affected customers in the Santa Rosa zones.

Guam Waterworks Authority (GWA) continues prioritizing immediate and long-term treatment solutions for the Y-15 well in Yigo, which has shown elevated levels of dieldrin, a pesticide. GWA has been working on the immediate issues at Y-15 but continues to work proactively on protecting all of GWA’s water sources.

GWA: ELEVATED DIELDRIN LEVELS LIMITED TO WELL Y-15 ( MANGILAO, GU) —Guam Waterworks Authority (GWA) confirms well Y-15 located in Yigo is...

Originally released by GWA on September 8, 2025 (UPDATED: 09/29/2025) The Santa Rosa Area of Northern Water System PWS ID# GU0000006 has...

Dieldrin Update as of September 26, 2025 - Correction on Wells, New Hotline.