Waipahu-Ewa-Waianae (HI) Water Quality

Waipahu-Ewa-Waianae is a large public water system in EPA region 9 that provides tap water for the 96706, 96707, 96792 zip codes. It has 64 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 0.4 µg/L. The maximum reported level of Manganese was 12 µg/L. There were 2 contamintants found in the Waipahu-Ewa-Waianae water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (39)

1,2,3-trichloropropane (39)

1,3-butadiene (39)

1,4-dioxane (39)

1-butanol (35)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (34)

17-alpha-ethynylestradiol (39)

17-beta-estradiol (39)

1H,1H,2H,2H-perfluorodecane sulfonic acid (34)

1H,1H,2H,2H-perfluorohexane sulfonic acid (34)

1H,1H,2H,2H-perfluorooctane sulfonic acid (34)

2,4-dinitrotoluene (70)

2,6-dinitrotoluene (70)

2-methoxyethanol (35)

2-propen-1-ol (Allyl Alcohol) (35)

4,4'-dichloro dichlorophenyl ethylene (DDE) (70)

4,8-dioxa-3H-perfluorononanoic acid (34)

4-androstene-3,17-dione (39)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (34)

alpha-hexachlorocyclohexane (35)

bromochloromethane (Halon 1011) (39)

bromomethane (39)

Butylated Hydroxyanisole (35)

chlorate (41)

chlorodifluoromethane (HCFC-22) (39)

chloromethane (39)

chlorpyrifos (35)

chromium (41)

chromium-6 (41)

cobalt (41)

dimethipin (35)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (70)

equilin (39)

estriol (39)

estrone (39)

ethoprop (35)

Germanium (35)

HAA5 (five regulated haloacetic acids) (6)

HAA6Br (six brominated haloacetic acids) (6)

HAA9 (nine haloacetic acids) (6)

hexafluoropropylene oxide dimer acid (GenX) (34)

lithium (34)

Manganese (35)

methyl-tertiary-butyl-ether (MTBE) (70)

molinate (70)

molybdenum (41)

N-ethyl perfluorooctanesulfonamidoacetic acid (34)

N-methyl perfluorooctanesulfonamidoacetic acid (34)

nitrobenzene (70)

nonafluoro-3,6-dioxaheptanoic acid (34)

o-toluidine (35)

oxyfluorfen (35)

perchlorate (70)

perfluoro(2-ethoxyethane)sulfonic acid (34)

perfluoro-3-methoxypropanoic acid (34)

perfluoro-4-methoxybutanoic acid (34)

perfluorobutanesulfonic acid (73)

perfluorobutanoic acid (34)

perfluorodecanoic acid (34)

perfluorododecanoic acid (34)

perfluoroheptanesulfonic acid (34)

perfluoroheptanoic acid (73)

perfluorohexanesulfonic acid (73)

perfluorohexanoic acid (34)

perfluorononanoic acid (73)

perfluorooctanesulfonic acid (73)

perfluorooctanoic acid (73)

perfluoropentanesulfonic acid (34)

perfluoropentanoic acid (34)

perfluorotetradecanoic acid (34)

perfluorotridecanoic acid (34)

perfluoroundecanoic acid (34)

profenofos (35)

quinoline (35)

s-ethyl-dipropylthiocarbamate (EPTC) (70)

strontium (41)

tebuconazole (35)

terbacil (70)

testosterone (39)

Total Permethrin (35)

tribufos (35)

vanadium (41)

Sampling Facilities

Waianae Tunnel
Ground Water (GW)

Waianae Tunnel post Cl2Entry Point to the Distribution System (EP)

Waianae Plantation Tunnels
Ground Water (GW)

Waianae Plantation Tunnel post Cl2Entry Point to the Distribution System (EP)

Makaha Well 3
Ground Water (GW)

Makaha Well 3 post Cl2Entry Point to the Distribution System (EP)

Makaha Well 1
Ground Water (GW)

Makaha Well 1 post Cl2Entry Point to the Distribution System (EP)

Makaha Well 5
Ground Water (GW)

Makaha Well 5 post Cl2Entry Point to the Distribution System (EP)

Waipahu Wells 1
Ground Water (GW)

Waipahu Well 1 post Cl2Entry Point to the Distribution System (EP)

Waipahu Wells 2
Ground Water (GW)

Waipahu Well 2 post Cl2Entry Point to the Distribution System (EP)

Waipahu Wells 4
Ground Water (GW)

Waipahu Well 4 post Cl2Entry Point to the Distribution System (EP)

Hoaeae Wells
Ground Water (GW)

Hoaeae Wells post Cl2Entry Point to the Distribution System (EP)

Kunia Wells 1 & 3
Ground Water (GW)

Kunia Wells 1 & 3 post Cl2Entry Point to the Distribution System (EP)

Kunia Wells 2
Ground Water (GW)

Kunia Wells 2 post Cl2Entry Point to the Distribution System (EP)

Honouliuli Wells 1 & 2
Ground Water (GW)

Honouliuli Wells 1 & 2 post Cl2Entry Point to the Distribution System (EP)

Makakilo Well
Ground Water (GW)

Makakilo Well post Cl2Entry Point to the Distribution System (EP)

Waianae Wells 1 & 2
Ground Water (GW)

Waianae Wells I & II post Cl2Entry Point to the Distribution System (EP)

Waianae Wells 3
Ground Water (GW)

Waianae Wells III post Cl2Entry Point to the Distribution System (EP)

Kamaile Wells
Ground Water (GW)

Kamaile Wells post Cl2Entry Point to the Distribution System (EP)

Waipahu Wells 3
Ground Water (GW)

Waipahu Wells 3 GAC post Cl2Entry Point to the Distribution System (EP)

Makaha Well 2
Ground Water (GW)

Makaha Well 2 post Cl2Entry Point to the Distribution System (EP)

Plantation Rd @ Park across Waianae Elem
Ground Water (GW)

Plantation Rd @ Park across Waianae ElemDistribution System (DS)

Makakilo Baptist Church
Ground Water (GW)

Makakilo Baptist ChurchDistribution System (DS)

Waipahu Elementary
Ground Water (GW)

Waipahu ElementaryDistribution System (DS)

Makaha Well 6
Ground Water (GW)

Makaha Well 6 Post Cl2Entry Point to the Distribution System (EP)

Makaha Shaft
Ground Water (GW)

Makaha Shaft Post Cl2Entry Point to the Distribution System (EP)

Waianae Hongwanji Mission
Ground Water (GW)

Waianae Hongwanji MissionMaximum Residence Time (MR)

MAKAKILO 2004-04
Ground Water (GW)

MAKAKILO 2004-04UK (UK)

HOAEAE PUMP 2 2301-35
Ground Water (GW)

HOAEAE PUMP 2 2301-35UK (UK)

HOAEAE PUMP 3 2301-36
Ground Water (GW)

HOAEAE PUMP 3 2301-36UK (UK)

HOAEAE PUMP 4 2301-37
Ground Water (GW)

HOAEAE PUMP 4 2301-37UK (UK)

HOAEAE PUMP 5 2301-38
Ground Water (GW)

HOAEAE PUMP 5 2301-38UK (UK)

HOAEAE PUMP 6 2301-39
Ground Water (GW)

HOAEAE PUMP 6 2301-39UK (UK)

KUNIA I PUMP 1 2302-01
Ground Water (GW)

KUNIA I PUMP 1 2302-01UK (UK)

KUNIA I PUMP 2 2302-02
Ground Water (GW)

KUNIA I PUMP 2 2302-02UK (UK)

KUNIA I PUMP 3 2302-03
Ground Water (GW)

KUNIA I PUMP 3 2302-03UK (UK)

KUNIA I PUMP 4 2302-04
Ground Water (GW)

KUNIA I PUMP 4 2302-04UK (UK)

WAIPAHU PUMP 2 2400-01
Ground Water (GW)

WAIPAHU PUMP 2 2400-01UK (UK)

WAIPAHU PUMP 1 2400-02
Ground Water (GW)

WAIPAHU PUMP 1 2400-02UK (UK)

WAIPAHU II W1 2400-05
Ground Water (GW)

WAIPAHU II W1 2400-05UK (UK)

WAIPAHU II W2 2400-06
Ground Water (GW)

WAIPAHU II W2 2400-06UK (UK)

KUNIA II PUMP 1 2402-01
Ground Water (GW)

KUNIA II PUMP 1 2402-01UK (UK)

KUNIA II PUMP 2 2402-02
Ground Water (GW)

KUNIA II PUMP 2 2402-02UK (UK)

KAMAILE 2 2712-30
Ground Water (GW)

KAMAILE 2 2712-30UK (UK)

KAMAILE PUMP 1 2712-31
Ground Water (GW)

KAMAILE PUMP 1 2712-31UK (UK)

WAIANAE TUNNEL 2809-06
Ground Water (GW)

WAIANAE TUNNEL 2809-06UK (UK)

WAIANAE III W1 2810-02
Ground Water (GW)

WAIANAE III W1 2810-02UK (UK)

MAKAHA WELL 5 2811-02
Ground Water (GW)

MAKAHA WELL 5 2811-02UK (UK)

MAKAHA SHAFT 2812-01
Ground Water (GW)

MAKAHA SHAFT 2812-01UK (UK)

WAIANAE P TUN 6 2908-03
Ground Water (GW)

WAIANAE P TUN 6 2908-03UK (UK)

MAKAHA WELL III 3010-11
Ground Water (GW)

MAKAHA WELL III 3010-11UK (UK)

MAKAHA WELL I 2911-01
Ground Water (GW)

MAKAHA WELL I 2911-01UK (UK)

WAIPAHU WELLS II P-3
Ground Water (GW)

WAIPAHU WELLS II P-3UK (UK)

KUNIA II P-3 2402-03
Ground Water (GW)

KUNIA II P-3 2402-03UK (UK)

KUNIA II P-4
Ground Water (GW)

KUNIA II P-4UK (UK)

WAIANAE III P-2 2810-03
Ground Water (GW)

WAIANAE III P-2 2810-03UK (UK)

WAIANAE WELL I
Ground Water (GW)

WAIANAE WELL IUK (UK)

WAIANAE WELL II
Ground Water (GW)

WAIANAE WELL IIUK (UK)

HONOULIULI WELLS II P-1
Ground Water (GW)

HONOULIULI WELLS II P-1UK (UK)

HONOULIULI WELLS II P-3
Ground Water (GW)

HONOULIULI WELLS II P-3UK (UK)

HONOULIULI WELLS II P-4
Ground Water (GW)

HONOULIULI WELLS II P-4UK (UK)

KUNIA WELLS III P-1
Ground Water (GW)

KUNIA WELLS III P-1UK (UK)

KUNIA WELLS III P-2
Ground Water (GW)

KUNIA WELLS III P-2UK (UK)

KUNIA WELLS III P-3
Ground Water (GW)

KUNIA WELLS III P-3UK (UK)

()

Maximum Residence Time (MR)

()

LD (LD)

()

MD (MD)

FAQ

Is Waipahu-Ewa-Waianae tap water safe to drink?

When was Waipahu-Ewa-Waianae last tested for water contamination?

The latest water samples were taken on November 9th, 2023.