GU Waterworks Authority - Northern (GU) Water Quality

GU Waterworks Authority - Northern is a large public water system in EPA region 9 that provides tap water for the 96910, 96915 zip codes. It has 144 facilities where the water supply was tested for 82 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 5.6 µg/L. The maximum reported level of Manganese was 9.5 µg/L. There were 2 contamintants found in the GU Waterworks Authority - Northern water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (185)

1,2,3-trichloropropane (185)

1,3-butadiene (185)

1,4-dioxane (187)

1-butanol (89)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (115)

17-alpha-ethynylestradiol (186)

17-beta-estradiol (186)

1H,1H,2H,2H-perfluorodecane sulfonic acid (115)

1H,1H,2H,2H-perfluorohexane sulfonic acid (115)

1H,1H,2H,2H-perfluorooctane sulfonic acid (115)

2,4-dinitrotoluene (194)

2,6-dinitrotoluene (194)

2-methoxyethanol (89)

2-propen-1-ol (Allyl Alcohol) (89)

4,4'-dichloro dichlorophenyl ethylene (DDE) (194)

4,8-dioxa-3H-perfluorononanoic acid (115)

4-androstene-3,17-dione (186)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (115)

alpha-hexachlorocyclohexane (78)

bromochloromethane (Halon 1011) (185)

bromomethane (185)

Butylated Hydroxyanisole (87)

chlorate (197)

chlorodifluoromethane (HCFC-22) (185)

chloromethane (185)

chlorpyrifos (78)

chromium (198)

chromium-6 (196)

cobalt (198)

dimethipin (78)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (192)

equilin (186)

estriol (186)

estrone (186)

ethoprop (78)

Germanium (118)

HAA5 (five regulated haloacetic acids) (14)

HAA6Br (six brominated haloacetic acids) (14)

HAA9 (nine haloacetic acids) (14)

hexafluoropropylene oxide dimer acid (GenX) (115)

lithium (115)

Manganese (118)

methyl-tertiary-butyl-ether (MTBE) (191)

molinate (194)

molybdenum (198)

N-ethyl perfluorooctanesulfonamidoacetic acid (115)

N-methyl perfluorooctanesulfonamidoacetic acid (115)

nitrobenzene (191)

nonafluoro-3,6-dioxaheptanoic acid (115)

o-toluidine (87)

oxyfluorfen (78)

perchlorate (194)

perfluoro(2-ethoxyethane)sulfonic acid (115)

perfluoro-3-methoxypropanoic acid (115)

perfluoro-4-methoxybutanoic acid (115)

perfluorobutanesulfonic acid (300)

perfluorobutanoic acid (115)

perfluorodecanoic acid (115)

perfluorododecanoic acid (115)

perfluoroheptanesulfonic acid (115)

perfluoroheptanoic acid (300)

perfluorohexanesulfonic acid (300)

perfluorohexanoic acid (115)

perfluorononanoic acid (300)

perfluorooctanesulfonic acid (300)

perfluorooctanoic acid (300)

perfluoropentanesulfonic acid (115)

perfluoropentanoic acid (115)

perfluorotetradecanoic acid (115)

perfluorotridecanoic acid (115)

perfluoroundecanoic acid (115)

profenofos (78)

quinoline (87)

s-ethyl-dipropylthiocarbamate (EPTC) (194)

strontium (198)

tebuconazole (78)

terbacil (194)

testosterone (186)

Total Permethrin (78)

tribufos (78)

vanadium (198)

Sampling Facilities

Well F-19
Ground Water (GW)

Tap after Chlorinator for F-19Entry Point to the Distribution System (EP)

Well D-25
Ground Water (GW)

Tap after Chlorinator for D-25Entry Point to the Distribution System (EP)

Well D-27
Ground Water (GW)

Tap after Chlorinator for D-27Entry Point to the Distribution System (EP)

Well Y-20
Ground Water (GW)

Tap after Chlorinator for Y-20Entry Point to the Distribution System (EP)

Well Y-22
Ground Water (GW)

Tap after Chlorinator for Y-22Entry Point to the Distribution System (EP)

Well A-3
Ground Water (GW)

Tap after Chlorinator for A-3Entry Point to the Distribution System (EP)
Tap before chlorinator for A-3SR (SR)

Well A-4
Ground Water (GW)

Tap after Chlorinator for A-4Entry Point to the Distribution System (EP)
Tap before chlorinator for A-4SR (SR)

Well A-8
Ground Water (GW)

Tap after Chlorinator for A-8Entry Point to the Distribution System (EP)
Tap before chlorinator for A-8SR (SR)

Well A-9
Ground Water (GW)

Tap after Chlorinator for A-9Entry Point to the Distribution System (EP)
Tap before chlorinator for A-9SR (SR)

Well A-13
Ground Water (GW)

Tap after Chlorinator for A-13Entry Point to the Distribution System (EP)
Tap before chlorinator for A-13SR (SR)

Well A-14
Ground Water (GW)

Tap after Chlorinator for A-14Entry Point to the Distribution System (EP)
Tap before chlorinator for A-14SR (SR)

Well A-15
Ground Water (GW)

Tap after Chlorinator for A-15Entry Point to the Distribution System (EP)
Tap before chlorinator for A-15SR (SR)

Well A-17
Ground Water (GW)

Tap after Chlorinator for A-17Entry Point to the Distribution System (EP)
Tap before chlorinator for A-17SR (SR)

Well A-19
Ground Water (GW)

Tap after Chlorinator for A-19Entry Point to the Distribution System (EP)
Tap before chlorinator for A-19SR (SR)

Well A-31
Ground Water (GW)

Tap after Chlorinator for A-31Entry Point to the Distribution System (EP)
Tap before chlorinator for A-31SR (SR)

Well A-32
Ground Water (GW)

Tap after Chlorinator for A-32Entry Point to the Distribution System (EP)
Tap before chlorinator for A-32SR (SR)

Well D-2
Ground Water (GW)

Tap before Chlorinator for D-2Entry Point to the Distribution System (EP)
Tap before chlorinator for D-2SR (SR)

Well D-7
Ground Water (GW)

Tap after Chlorinator for D-7Entry Point to the Distribution System (EP)
Tap before chlorinator for D-7SR (SR)

Well D-8
Ground Water (GW)

Tap after Chlorinator for D-8Entry Point to the Distribution System (EP)
Tap before chlorinator for D-8SR (SR)

Well D-14
Ground Water (GW)

Tap after Chlorinator for D-14Entry Point to the Distribution System (EP)
Tap before chlorinator for D-14SR (SR)

Well D-15
Ground Water (GW)

Tap after Chlorinator for D-15Entry Point to the Distribution System (EP)
Tap before chlorinator for D-15SR (SR)

Well D-16
Ground Water (GW)

Tap after Chlorinator for D-16Entry Point to the Distribution System (EP)
Tap before chlorinator for D-16SR (SR)

Well D-21
Ground Water (GW)

Tap after Chlorinator for D-21Entry Point to the Distribution System (EP)
Tap before chlorinator for D-20SR (SR)

Well D-22
Ground Water (GW)

Tap after Chlorinator for D-22Entry Point to the Distribution System (EP)

Well EX-5A
Ground Water (GW)

Tap after Chlorinator for EX-5AEntry Point to the Distribution System (EP)
Tap before chlorinator for EX-5ASR (SR)

Well F-8
Ground Water (GW)

Tap after Chlorinator for F-8Entry Point to the Distribution System (EP)
Tap before chlorinator for F-8SR (SR)

Well F-10
Ground Water (GW)

Tap after Chlorinator for F-10Entry Point to the Distribution System (EP)
Tap before chlorinator for F-10SR (SR)

Well F-12
Ground Water (GW)

Tap after Chlorinator for F-12Entry Point to the Distribution System (EP)
Tap before chlorinator for F-12SR (SR)

Well F-15
Ground Water (GW)

Tap after Chlorinator for F-15Entry Point to the Distribution System (EP)
Tap before chlorinator for F-15SR (SR)

Well H-1
Ground Water (GW)

Tap after Chlorinator for H-1Entry Point to the Distribution System (EP)
Tap before chlorinator for H-1SR (SR)

Well HGC-2
Ground Water (GW)

Tap after Chlorinator for HGC-12Entry Point to the Distribution System (EP)

Well M-7
Ground Water (GW)

Tap after Chlorinator for M-7Entry Point to the Distribution System (EP)
Tap before chlorinator for M-7SR (SR)

Well M-8
Ground Water (GW)

Tap after Chlorinator for M-8Entry Point to the Distribution System (EP)
Tap before chlorinator for M-8SR (SR)

Well M-9
Ground Water (GW)

Tap after Chlorinator for M-9Entry Point to the Distribution System (EP)
Tap before chlorinator for M-9SR (SR)

Well M-12
Ground Water (GW)

Tap before Chlorinator for M-12Entry Point to the Distribution System (EP)

Well M-21
Ground Water (GW)

Tap after Chlorinator for M-21Entry Point to the Distribution System (EP)
Tap before chlorinator for M-21SR (SR)

Well M-15
Ground Water (GW)

Tap after Chlorinator for M-15Entry Point to the Distribution System (EP)
Tap before chlorinator for M-15SR (SR)

Well M-18
Ground Water (GW)

Tap after Chlorinator for M-18Entry Point to the Distribution System (EP)
Tap before chlorinator for M-18SR (SR)

Well M-20A
Ground Water (GW)

Tap after Chlorinator for M-20AEntry Point to the Distribution System (EP)
Tap before chlorinator for M-20ASR (SR)

Well NAS-1
Ground Water (GW)

Tap after Chlorinator for NAS-1Entry Point to the Distribution System (EP)
Tap before chlorinator for NAS-1SR (SR)

Well Y-1
Ground Water (GW)

Tap after Chlorinator for Y-1Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-1SR (SR)

Well Y-5
Ground Water (GW)

Tap after Chlorinator for Y-5Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-5SR (SR)

Well Y-9
Ground Water (GW)

Tap after Chlorinator for Y-9Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-9SR (SR)

Well Y-10
Ground Water (GW)

Tap after Chlorinator for Y-10Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-10SR (SR)

Well Y-14
Ground Water (GW)

Tap after Chlorinator for Y-14Entry Point to the Distribution System (EP)

Well Y-15
Ground Water (GW)

Tap after Chlorinator for Y-15Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-15SR (SR)

Well Y-17
Ground Water (GW)

Tap after Chlorinator for Y-17Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-17SR (SR)

Well Y-21A
Ground Water (GW)

Tap after Chlorinator for Y-21AEntry Point to the Distribution System (EP)
Tap before chlorinator for y-21ASR (SR)

Well Y-23
Ground Water (GW)

Tap after Chlorinator for Y-23Entry Point to the Distribution System (EP)

Well F-3
Ground Water (GW)

Tap after Chlorinator for F-3Entry Point to the Distribution System (EP)

Well A-30
Ground Water (GW)

Tap after Chlorinator for A-30Entry Point to the Distribution System (EP)

Well D-10
Ground Water (GW)

Tap after Chlorinator for D-10Entry Point to the Distribution System (EP)

Well D-17A
Ground Water (GW)

Tap after Chlorinator for D-17AEntry Point to the Distribution System (EP)

Well D-18B
Ground Water (GW)

Tap after Chlorinator for D-18BEntry Point to the Distribution System (EP)

Well D-24
Ground Water (GW)

Tap after chlorinator for D-24Entry Point to the Distribution System (EP)

Well M-17A
Ground Water (GW)

Tap after Chlorinator for M-17AEntry Point to the Distribution System (EP)

Tumon-Maui
Ground Water (GW)

Tap after Chlorinator for Tumon-MauiEntry Point to the Distribution System (EP)

Well F-7
Ground Water (GW)

Tap after Chlorinator for F-7Entry Point to the Distribution System (EP)

Well F-20
Ground Water (GW)

Tap after Chlorinator for F-20Entry Point to the Distribution System (EP)

Well D-1
Ground Water (GW)

Tap after Chlorinator for D-1Entry Point to the Distribution System (EP)
Tap before Chlorinator for D-1Entry Point to the Distribution System (EP)
Tap before chlorinator for D-1SR (SR)

Well D-9
Ground Water (GW)

Tap after Chlorinator for D-9Entry Point to the Distribution System (EP)
Tap before chlorinator for D-9SR (SR)

Well F-7
Ground Water (GW)

Tap after Chlorinator for F-7Entry Point to the Distribution System (EP)
Tap before chlorinator for F-7SR (SR)

Well M-5
Ground Water (GW)

Tap after Chlorinator for M-5Entry Point to the Distribution System (EP)
Tap before chlorinator for M-5SR (SR)

Well M-14
Ground Water (GW)

Tap before Chlorinator for M-14Entry Point to the Distribution System (EP)
Tap before chlorinator for M-14SR (SR)

Well Y-16
Ground Water (GW)

Tap after Chlorinator for Y-16Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-16SR (SR)

Well F-6
Ground Water (GW)

Tap after Chlorinator for F-6Entry Point to the Distribution System (EP)

Well A-25
Ground Water (GW)

Tap after Chlorinator for A-25Entry Point to the Distribution System (EP)

Well GIAA-1
Ground Water (GW)

Tap after Chlorinator for GIAA-1Entry Point to the Distribution System (EP)

Well GIAA-2
Ground Water (GW)

Tap after Chlorinator for GIAA-2Entry Point to the Distribution System (EP)

Distribution System
Ground Water (GW)

Dededo Astumbo Elem. SchoolDistribution System (DS)
Harmon Iglesia Ni Kristo ChurchDistribution System (DS)
Dededo Public HelathDistribution System (DS)
Santa Ana Housing (150 Sunflower)Distribution System (DS)
Pagat Young Pagat MarketDistribution System (DS)
Pago Bay Learning CenterDistribution System (DS)
Horizon HotelDistribution System (DS)
Old AirportDistribution System (DS)
New Airport (GIAA)Distribution System (DS)

Astumbo Elem. School
Ground Water (GW)

Astumbo Elem. SchoolMaximum Residence Time (MR)
Astumbo Elem. SchoolMaximum Residence Time (MR)

Well D-26
Ground Water (GW)

Tap after Chlorinator for D-26Entry Point to the Distribution System (EP)

Well D-28
Ground Water (GW)

Tap after Chlorinator for D-28Entry Point to the Distribution System (EP)

Well Y-18
Ground Water (GW)

Tap after Chlorinator for Y-18Entry Point to the Distribution System (EP)

Well Y-19
Ground Water (GW)

Tap after Chlorinator for Y-19Entry Point to the Distribution System (EP)

Iglesia Ni Kristo Church
Ground Water (GW)

Iglesia Ni Kristo ChurchMaximum Residence Time (MR)
Iglesia Ni Kristo ChurchMaximum Residence Time (MR)

Dededo Public Health
Ground Water (GW)

Dededo Public HealthMaximum Residence Time (MR)
Dededo Public HealthMaximum Residence Time (MR)

Sta Ana Housing 150 Sunflower St
Ground Water (GW)

Sta Ana Housing 150 Sunflower StMaximum Residence Time (MR)
Sta Ana Housing 150 Sunflower StMaximum Residence Time (MR)

Pagat Market
Ground Water (GW)

Pagat MarketMaximum Residence Time (MR)
Pagat MarketMaximum Residence Time (MR)

Pago Bay Learning Center
Ground Water (GW)

Pago Bay Learning CenterMaximum Residence Time (MR)
Pago Bay Learning CenterMaximum Residence Time (MR)

Well A-1
Ground Water (GW)

Tap after Chlorinator for A-1Entry Point to the Distribution System (EP)
Tap before chlorinator for A-1SR (SR)

Well A-5
Ground Water (GW)

Tap after Chlorinator for A-5Entry Point to the Distribution System (EP)
Tap before chlorinator for A-5SR (SR)

Well A-6
Ground Water (GW)

Tap after Chlorinator for A-6Entry Point to the Distribution System (EP)
Tap before chlorinator for A-6SR (SR)

Well A-10
Ground Water (GW)

Tap after Chlorinator for A-10Entry Point to the Distribution System (EP)
Tap before chlorinator for A-10SR (SR)

Well A-12
Ground Water (GW)

Tap after Chlorinator for A-12Entry Point to the Distribution System (EP)
Tap before chlorinator for A-12SR (SR)

Well A-18
Ground Water (GW)

Tap after Chlorinator for A-18Entry Point to the Distribution System (EP)
Tap before chlorinator for A-18SR (SR)

Well A-21
Ground Water (GW)

Tap after Chlorinator for A-21Entry Point to the Distribution System (EP)
Tap before chlorinator for A-21SR (SR)

Well A-23
Ground Water (GW)

Tap after Chlorinator for A-23Entry Point to the Distribution System (EP)
Tap before chlorinator for A-23SR (SR)

Well AG-1
Ground Water (GW)

Tap after Chlorinator for AG-1Entry Point to the Distribution System (EP)
Tap before chlorinator for AG-1SR (SR)

Well D-6
Ground Water (GW)

Tap after Chlorinator for D-6Entry Point to the Distribution System (EP)
Tap before chlorinator for D-6SR (SR)

Well D-11
Ground Water (GW)

Tap after Chlorinator for D-11Entry Point to the Distribution System (EP)

Well D-12
Ground Water (GW)

Tap after Chlorinator for D-12Entry Point to the Distribution System (EP)
Tap before chlorinator for D-12SR (SR)

Well D-20
Ground Water (GW)

Tap after Chlorinator for D-20Entry Point to the Distribution System (EP)
Tap before chlorinator for D-20SR (SR)

Well EX-11
Ground Water (GW)

Tap after Chlorinator for EX-11Entry Point to the Distribution System (EP)
Tap before chlorinator for EX-11SR (SR)

Well F-9
Ground Water (GW)

Tap after Chlorinator for F-9Entry Point to the Distribution System (EP)
Tap before chlorinator for F-91SR (SR)

Well F-11
Ground Water (GW)

Tap after Chlorinator for F-11Entry Point to the Distribution System (EP)
Tap before chlorinator for F-11SR (SR)

Well F-13
Ground Water (GW)

Tap after Chlorinator for F-13Entry Point to the Distribution System (EP)
Tap before chlorinator for F-13SR (SR)

Well F-16
Ground Water (GW)

Tap after Chlorinator for F-16Entry Point to the Distribution System (EP)
Tap before chlorinator for F-16SR (SR)

Well F-17
Ground Water (GW)

Tap after Chlorinator for F-17Entry Point to the Distribution System (EP)
Tap before chlorinator for F-17SR (SR)

Well F-18
Ground Water (GW)

Tap after Chlorinator for F-18Entry Point to the Distribution System (EP)
Tap before chlorinator for F-18SR (SR)

Well GH-501
Ground Water (GW)

Tap after Chlorinator for GH-501Entry Point to the Distribution System (EP)
Tap before chlorinator for GH501SR (SR)

Well M-2
Ground Water (GW)

Tap after Chlorinator for M-2Entry Point to the Distribution System (EP)
Tap before chlorinator for M-2SR (SR)

Well M-3
Ground Water (GW)

Tap after Chlorinator for M-3Entry Point to the Distribution System (EP)
Tap before chlorinator for M-3SR (SR)

Well M-4
Ground Water (GW)

Tap after Chlorinator for M-4Entry Point to the Distribution System (EP)
Tap before chlorinator for M-4SR (SR)

Well M-23
Ground Water (GW)

Tap after Chlorinator for M-23Entry Point to the Distribution System (EP)
TAP BEFORE CHLORINATOR FOR M-23SR (SR)

Well M-17B
Ground Water (GW)

Tap after Chlorinator for M-17BEntry Point to the Distribution System (EP)
Tap before chlorinator for M-17BSR (SR)

Well Y-2
Ground Water (GW)

Tap after Chlorinator for Y-2Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-2SR (SR)

Well Y-3
Ground Water (GW)

Tap after Chlorinator for Y-3Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-3SR (SR)

Well Y-4A
Ground Water (GW)

Tap after Chlorinator for Y-4AEntry Point to the Distribution System (EP)

Well Y-6
Ground Water (GW)

Tap after Chlorinator for Y-6Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-6SR (SR)

Well Y-12
Ground Water (GW)

Tap after Chlorinator for Y-12Entry Point to the Distribution System (EP)
Tap before chlorinator for Y-12SR (SR)

Well F-1
Ground Water (GW)

Tap after Chlorinator for F-1Entry Point to the Distribution System (EP)

Well F-2
Ground Water (GW)

Tap after Chlorinator for F-2Entry Point to the Distribution System (EP)

Well F-4
Ground Water (GW)

Tap after Chlorinator for F-4Entry Point to the Distribution System (EP)

Well F-5
Ground Water (GW)

Tap after Chlorinator for F-5Entry Point to the Distribution System (EP)

Well AG-2A
Ground Water (GW)

Tap after Chlorinator for AG-2AEntry Point to the Distribution System (EP)

Well D-4
Ground Water (GW)

Tap after Chlorinator for D-4Entry Point to the Distribution System (EP)

Well D-19
Ground Water (GW)

Tap after Chlorinator for D-19Entry Point to the Distribution System (EP)

Well A-2
Ground Water (GW)

Tap after chlorinator for A-2Entry Point to the Distribution System (EP)
Tap before chlorinator for A-2SR (SR)

Well A-26
Ground Water (GW)

Tap after chlorinator for A-26Entry Point to the Distribution System (EP)
Tap before chlorinator for A-26SR (SR)

Well A-29
Ground Water (GW)

Tap before chlorinator for A-29Entry Point to the Distribution System (EP)

well D-5
Ground Water (GW)

Tap before chlorinator for D-5Entry Point to the Distribution System (EP)
Tap before chlorinator for D-5SR (SR)

Well D-13
Ground Water (GW)

Tap after chlorinator for D-13Entry Point to the Distribution System (EP)
Tap before chlorinator for D-13SR (SR)

Well M-1
Ground Water (GW)

Tap after chlorinator for M-1Entry Point to the Distribution System (EP)
Tap before chlorinator for M-1SR (SR)

Well M-6
Ground Water (GW)

Tap after chlorinator for M-6Entry Point to the Distribution System (EP)
Tap before chlorinator for M-6SR (SR)

Well A-28
Ground Water (GW)

Tap before chlorinator for A-28Entry Point to the Distribution System (EP)

Well A-7
Ground Water (GW)

Tap before chlorinator for A-7SR (SR)

Well A-25
Ground Water (GW)

Tap before chlorinator for A-25SR (SR)

Well A-28
Ground Water (GW)

Tap before chlorinator for A-28SR (SR)

Well A-30
Ground Water (GW)

Tap before chlorinator for A-30SR (SR)

Well AG-2A
Ground Water (GW)

Tap before chlorinator for AG-2ASR (SR)

Well D-3
Ground Water (GW)

Tap before chlorinator for D-3SR (SR)

Well D-4
Ground Water (GW)

Tap before chlorinator for D-4SR (SR)

Well D-10
Ground Water (GW)

Tap before chlorinator for D-10SR (SR)

Well D-17
Ground Water (GW)

Tap before chlorinator for D-17SR (SR)

Well D-19
Ground Water (GW)

Tap before chlorinator for D-19SR (SR)

Well D-24
Ground Water (GW)

Tap before chlorinator for D-24SR (SR)

Well F-1
Ground Water (GW)

Tap before chlorinator for F-1SR (SR)

Well F-2
Ground Water (GW)

Tap before chlorinator for F-2SR (SR)

Well F-3
Ground Water (GW)

Tap before chlorinator for F-3SR (SR)

Well F-4
Ground Water (GW)

Tap before chlorinator for F-4SR (SR)

Well F-5
Ground Water (GW)

Tap before chlorinator for F-5SR (SR)

Well F-6
Ground Water (GW)

Tap before chlorinator for F-6SR (SR)

Well M-17A
Ground Water (GW)

Tap before chlorinator for M-17ASR (SR)

FAQ

Is GU Waterworks Authority - Northern tap water safe to drink?

When was GU Waterworks Authority - Northern last tested for water contamination?

The latest water samples were taken on November 11th, 2024.