Commonwealth Utilities Corp. (Saipan) is a large public water system in EPA region 9 that provides tap water for the 96950 zip codes. It has 61 facilities where the water supply was tested for 80 chemical contaminants that impact tap water quality and human health.
The maximum reported level of HAA5 (five regulated haloacetic acids) was 3.45 µg/L. The maximum reported level of Manganese was 1 µg/L. There were 2 contamintants found in the Commonwealth Utilities Corp. (Saipan) water supply at levels that were above the minimum reporting level.
Marpi Reservoir
Ground Water (GW)Marpi ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
TS-1 OutletEntry Point to the Distribution System (EP)
Maui 4 Sumptank
Ground Water (GW)Maui 4 SumptankEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Capitol Hill Reservoir
Ground Water (GW)Capitol Hill ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Calhoun Reservoir
Ground Water (GW)Calhoun ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Gualo Rai Reservoir
Ground Water (GW)Gualo Rai ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
GR 4/5 EP @ GR-4
Ground Water (GW)GR 4/5 EPEntry Point to the Distribution System (EP)
GR 4/5 EP @ GR-4Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Agag Reservoir
Ground Water (GW)Agag ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
San Vicente Reservoir
Ground Water (GW)San Vicente ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Isley Reservoir
Ground Water (GW)Isley ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. System at Koblerville TapEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Puerto Rico Reservoir
Ground Water (GW)Puerto Rico ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap after chlorinatorEntry Point to the Distribution System (EP)
Kagman Tank Outlet
Ground Water (GW)Kagman Tank OutletEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap after valve boxEntry Point to the Distribution System (EP)
IF 28 EP
Ground Water (GW)IF-28 EPEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
CH Reservoir OutletEntry Point to the Distribution System (EP)
Dandan Reservoir
Ground Water (GW)Dandan ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Before first house (Kelly Cepeda)Entry Point to the Distribution System (EP)
Rapagao Reservoir
Ground Water (GW)Rapagao ReservoirEntry Point to the Distribution System (EP)
Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap after chlorinatorEntry Point to the Distribution System (EP)
As Terlaje Tank
Ground Water (GW)As Terlaje TankEntry Point to the Distribution System (EP)
As Terlaje Tank EPEntry Point to the Distribution System (EP)
SV Reservoir OutletEntry Point to the Distribution System (EP)
KG-131 EP
Ground Water (GW)Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
01048 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Kagman Booster 1
Ground Water (GW)Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Tap after chlorinatorEntry Point to the Distribution System (EP)
Evelyn Deleon Guerrero HAA
Ground Water (GW)Evelyn Deleon GuerreroDistribution System (DS)
Isley Reservoir OutletEntry Point to the Distribution System (EP)
Frank Aldan HAA
Ground Water (GW)Frank Aldan JrDistribution System (DS)
Airport Reservoir OutletEntry Point to the Distribution System (EP)
Susana Mafnas HAA
Ground Water (GW)Susana MafnasDistribution System (DS)
Tap after chlorinatorEntry Point to the Distribution System (EP)
Sofina Tomokane HAA
Ground Water (GW)Sofina TomokaneDistribution System (DS)
Before first houseEntry Point to the Distribution System (EP)
Distribution System
Surface Water (SW)DSMRTMaximum Residence Time (MR)
IF-208
Ground Water (GW)IF-208 EPEntry Point to the Distribution System (EP)
Isley Booster 1
Surface Water (SW)Isley Boooster 1Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Isley Boooster 2
Ground Water (GW)Isley Boooster 2Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Koblerville Sumptank
Ground Water (GW)Koblerville SumptankEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Donni Springs EP
Ground Water (GW)Donni Springs EPEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
KV 20 EP
Ground Water (GW)KV 20 EPEntry Point to the Distribution System (EP)
Before first houseEntry Point to the Distribution System (EP)
KV 21 to 25 EP
Ground Water (GW)KV 21 to 25 EPEntry Point to the Distribution System (EP)
Tap after chlorinatorEntry Point to the Distribution System (EP)
PR 162 EP
Ground Water (GW)01011 WellheadEntry Point to the Distribution System (EP)
TS-2 OutletEntry Point to the Distribution System (EP)
SQ Valve Box
Ground Water (GW)SQ Valve BoxEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Agag 73 EP
Ground Water (GW)01041 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
SV-7 EP
Ground Water (GW)01072 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Isley Field 105 EP
Ground Water (GW)01115 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Isley 16 EP
Ground Water (GW)01128 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
Duenas Well EP
Ground Water (GW)01132 WellheadEntry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
KV 13/116 EP
Ground Water (GW)KV 13Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
KV 21/22 EP
Ground Water (GW)KV-21Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
KV 23/24/25 EP
Ground Water (GW)KV-25Entry Point to the Distribution System (EP)
Tap at wellheadEntry Point to the Distribution System (EP)
SQ-5 EP
Ground Water (GW)01019 WellheadEntry Point to the Distribution System (EP)
Tasa Reservoir OutletEntry Point to the Distribution System (EP)
SV-1 EP
Ground Water (GW)01070 WellheadEntry Point to the Distribution System (EP)
Maui 4 Sumptank OutletEntry Point to the Distribution System (EP)
DD 7/8 EP @ DD-8
Ground Water (GW)01136 WellheadEntry Point to the Distribution System (EP)
CL Reservoir OutletEntry Point to the Distribution System (EP)
As Lito 1/2/5 EP
Ground Water (GW)CUC Tap @ Simiya St.Entry Point to the Distribution System (EP)
GR Reservoir OutletEntry Point to the Distribution System (EP)
DD-3 EP
Ground Water (GW)01134 Wellhead (1st cust - Movie Station)Entry Point to the Distribution System (EP)
Tap after chlorinatorEntry Point to the Distribution System (EP)
OB 14/15 EP
Ground Water (GW)01171 WellheadEntry Point to the Distribution System (EP)
AG Reservoir OutletEntry Point to the Distribution System (EP)
DD Well 3
Ground Water (GW)Tap at wellheadEntry Point to the Distribution System (EP)
Marpi Reservoir
Ground Water (GW)Marpi Reservoir OutletEntry Point to the Distribution System (EP)
Achugao Sumptank
Ground Water (GW)Sumptank OutletEntry Point to the Distribution System (EP)
KG Well 14
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
OB Well 13
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
Isley Booster 1
Ground Water (GW)IB-1 OutletEntry Point to the Distribution System (EP)
Isley Field Well 105
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
Isley Booster 2
Ground Water (GW)IB-2 OutletEntry Point to the Distribution System (EP)
Isley Well 204
Ground Water (GW)Before first houseEntry Point to the Distribution System (EP)
Isley Well 16
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
Ben Duenas Well
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
Dandan Well 4
Ground Water (GW)Tap after chlorinatorEntry Point to the Distribution System (EP)
Koblerville Sumptank
Ground Water (GW)KV Sumptank OutletEntry Point to the Distribution System (EP)
KV Well 22
Ground Water (GW)Before first houseEntry Point to the Distribution System (EP)
KV Well 24
Ground Water (GW)Before first houseEntry Point to the Distribution System (EP)
DS Sumptank
Ground Water (GW)DS Sumptank outletEntry Point to the Distribution System (EP)
The latest water samples were taken on September 9th, 2024.