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News & Updates
GWA is your trusted source for news and updates on water safety and dieldrin-related issues. We focus on providing comprehensive information to ensure you are well-informed about safe drinking water matters. Visit this page often as we will update the public on the safety issues related to drinking water in your area.
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For questions regarding whether you are impacted, contact GWA at 671-647-7800 or 671-647-7803
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For questions regarding health risks and water quality, contact Guam EPA Community Hotline at 671-888-4342
Dieldrin Testing Data from Samples Collected Nov. 11 & Nov. 13
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
GWA News
Dec 11, 20251 min read
COURTESY BOTTLED WATER DISTRIBUTION FOR SANTA ROSA/YIGO AREA CUSTOMERS ENDING NOV. 12
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
GWA News
Nov 10, 20251 min read
MULTIPLE TEST RESULTS CONFIRM Y-15 TREATMENT SYSTEM EFFECTIVE, GWA REQUESTS GEPA RESCIND DO NOT DRINK ADVISORY
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
GWA News
Nov 7, 20252 min read
Dieldrin IAL Update Release No. 4: FOR THE THIRD WEEK IN A ROW, TEST RESULTS SHOW NO DETECTION OF DIELDRIN AT WELL Y-15, TREATMENT SOLUTION SUCCESSFUL
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
GWA News
Nov 4, 20252 min read
Dieldrin IAL Update Release No. 3: TEST RESULTS SHOW NO DETECTION OF DIELDRIN AT WELL Y-15, TREATMENT SOLUTION SUCCESSFUL
No dieldrin has been detected at well Y-15 in Yigo, according to confirmed laboratory analysis after two rounds of testing. The results of “non-detect” affirms 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 PFAS from drinking water. Dieldr
GWA News
Oct 29, 20253 min read
GWA RETURNS TO REGULAR CALL CENTER HOURS
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
GWA Customer Service
Oct 23, 20251 min read
Dieldrin IAL Update Release No. 2: INTERIM TREATMENT SOLUTION FOR WELL Y-15 COMPLETE AND ONLINE
(Mangilao, GU) — On Oct. 12, the Guam Waterworks Authority (GWA) completed the successful installation of its interim treatment system...
GWA News
Oct 13, 20253 min read
Point of Entry (POE) / Point-of-Use (POU) Filtration System Program Frequently Asked Questions (FAQs)
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
GWA Customer Service
Oct 10, 20254 min read
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