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On November 4, GWA had previously reported the status of entry points that tested higher than, or equal to 50% of the IAL for dieldrin. The table below provides a status update to the November 4 reporting with analytical data from samples collected on November 11 and November 13: Residents with questions about their water service or quality can contact GWA Customer Service at 671-647-7800 Monday through Friday from 7:30 a.m. to 6 p.m. and Saturday from 8 a.m. to noon. The Gua

The Guam Waterworks Authority (GWA) announced today that its courtesy bottled water distribution for customers in the Santa Rosa/Yigo area will conclude on Wednesday, Nov. 12, following four consecutive weeks of sampling and analysis at Well Y-15. Laboratory results of water samples collected on Oct. 11, 16, 23, and 29 all showed non-detect levels for dieldrin in the treated water. These consistent results confirm that the water from Well Y-15 is now safe to drink, cook wi

Today, the Guam Waterworks Authority (GWA) submitted a formal response to the Guam Environmental Protection Agency (EPA), requesting to rescind the “Do Not Drink Without Treatment” advisory for the Santa Rosa/Yigo area. GWA’s letter follows four weeks of comprehensive monitoring, treatment, and testing that confirms GWA’s drinking water from well Y-15 has no detection of dieldrin. Laboratory analysis performed with raw and finished water samples collected on Oct. 11, Oct. 16

No dieldrin has been detected at well Y-15 in Yigo after treatment, according to confirmed laboratory analysis after three rounds of testing.  The results of “non-detect” continues to affirm the Guam Waterworks Authority’s (GWA) interim treatment system at well Y-15 has successfully removed dieldrin levels. This system, completed on Oct. 10, uses granular activated carbon (GAC) filtration, an EPA-approved and proven technology used to remove contaminants like dieldrin and PFA

Effective immediately, Guam Waterworks Authority (GWA) customer service call center will return to normal hours of Monday through Friday from 7:30 a.m. to 6 p.m. and Saturday from 8 a.m. to noon.  Customers can reach the call center at 671-647-7800 / 7803. Additionally, customers may submit questions and service requests to the online customer portal at gwa.custhelp.com  at their convenience.  The return to normal hours comes after GWA previously offered extended call center

Application forms available online. Review the FAQ's provided below to help you select the correct application form to submit to GWA. This program provides for GWA supplied NSF 53 or NSF 401 certified POE water filtration systems or reimbursement for qualifying customer-purchased NSF 53 or NSF 401 POE or POU filtration systems to reduce the concentration of dieldrin in supplied water until the GWA’s permanent Granular Activated Carbon (GAC) treatment system is operational at

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