Northern Mariana Islands Drinking Water Compliance Records
36 water systems serving 64,004 people. 2,627 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
1
3%
B
7
19%
C
18
50%
D
9
25%
F
1
3%
36
Water Systems
64,004
Population Served
2,627
Historical Records
115
Health-Based (All Years)
Systems With the Most Recent EPA Records
Tropical Drinking Water
47 served133 historical records80 recent
D
Xu Sunshine Corp
79 served134 historical records73 recent
C
Pacific Palms
56 served145 historical records66 recent
F
Marianas Ice And Water
300 served68 historical records64 recent
C
San Jose Mart Water
130 served68 historical records62 recent
C
Popz Purified Drinking Water
100 served59 historical records59 recent
C
3K Ice And Water Company
208 served67 historical records59 recent
C
Black Micro Corporation Tinian
150 served58 historical records58 recent
C
Kensington Dormitory
260 served132 historical records38 recent
C
Hilltop Condominium
51 served164 historical records22 recent
C
Large Systems With No Recent Records
Finasisu Terrace Apartment
393 served10 historical records
A
Largest Water Systems in Northern Mariana Islands
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| Commonwealth Utilities Corp (Saipan) | D | 48,524 | 65 |
| Saipan Ice And Water | B | 3,101 | 33 |
| Commonwealth Utilities Corp (Tinian) | C | 3,005 | 17 |
| Commonwealth Utilities Corp (Rota) | C | 2,504 | 19 |
| Star Water | C | 1,522 | 69 |
| Kensington Hotel | C | 634 | 71 |
| Pacific Islands Club | C | 554 | 16 |
| Finasisu Terrace Apartment | A | 393 | 10 |
| The Water Company | D | 310 | 154 |
| Tinian Ice And Water | C | 300 | 150 |
| Marianas Ice And Water | C | 300 | 68 |
| Kensington Dormitory | C | 260 | 132 |
| Anaks Condominium | C | 243 | 145 |
| Rota Crystal | B | 226 | 7 |
| 3K Ice And Water Company | C | 208 | 67 |
| Lao Lao Bay Golf Resort | C | 200 | 20 |
| JG Sablan Ice And Water | B | 173 | 134 |
| Aqua Water | D | 170 | 5 |
| Diamond Ice And Water | B | 155 | 14 |
| Black Micro Corporation Tinian | C | 150 | 58 |
Contaminants in Northern Mariana Islands
Lead in Northern Mariana IslandsArsenic in Northern Mariana IslandsNitrate in Northern Mariana IslandsFluoride in Northern Mariana IslandsPFOS in Northern Mariana IslandsPFOA in Northern Mariana IslandsTHMs in Northern Mariana IslandsHAA5 in Northern Mariana Islands
Cities in Northern Mariana Islands
Saipan(16)LOWER BASE(2)SAIPAN(16)SAN JOSE(3)Sinapalu(1)CHALAN LAU LAU(2)SAN ANTONIO(3)SAIPAM(1)AS MATUIS(1)TINIAN(2)FINASISU(1)San Jose(1)PAPAGO(1)SAN ROQUE(1)PUERTO RICO(1)GARAPAN(2)ROTA(1)SINAPALU(1)SAN JOSE VILLAGE(1)KAGMAN(1)CAPITAL HILL(1)CHALAN KIYA(2)SAN VINCENTE(2)KOBLERVILLE(1)FINA SISU(1)GUALO RAI(1)Afetnas(1)AFETNA(1)