State drinking water records
Northern Mariana Islands drinking water systems
36 community water systems serve Northern Mariana Islands and are listed below under 3 counties and on the pages of 95 cities and towns. Their own population figures add up to 63,952 people, a sum that counts people twice where one system sells water to another.
12 of them (33%) had at least one health-based violation in the last 10 years. 10 systems still have one unresolved.
36 rely mainly on groundwater, counting water bought from other systems.
34 systems filed a lead service line inventory listing 0 lead lines, 0 galvanized lines that must be replaced and 16,005 lines of unknown material.
23 systems have no service area map from EPA and are placed by mailing address.
- Community water systems
- 36
- People served, sum of each system's own figure
- 63,952
- Systems with a health-based violation, last 10 years
- 12
- Systems with one unresolved
- 10
- Lead service lines in inventories
- 0
Counties
3 countiesEach county counts the systems whose service area map reaches it. Systems placed only by a mailing address are listed on the county pages but not counted here.
| County | Systems | People served | With a health-based violation, 10 years | With one unresolved |
|---|---|---|---|---|
| Rota Municipality | 1 | 2,504 | 1 | 0 |
| Saipan Municipality | 11 | 50,954 | 2 | 2 |
| Tinian Municipality | 1 | 3,005 | 1 | 0 |
Largest systems
| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Commonwealth Utilities Corp (Saipan) | Saipan Municipality | 48,524 | Groundwater | 13 | 0 | 0 |
| Saipan Ice and Water | Saipan Municipality | 3,101 | Groundwater | 0 | 1 | 0 |
| Commonwealth Utilities Corp (Tinian) | Tinian Municipality | 3,005 | Groundwater | 2 | 0 | 0 |
| Commonwealth Utilities Corp (Rota) | Rota Municipality | 2,504 | Groundwater | 2 | 0 | 0 |
| Star Water | Saipan Municipality | 1,522 | Groundwater | 0 | 1 | 0 |
| Kensington Hotel | Saipan Municipality | 634 | Groundwater | 0 | 3 | 0 |
| Pacific Islands Club | Saipan Municipality | 554 | Groundwater | 0 | 0 | 0 |
| Finasisu Terrace Apartment | Saipan Municipality | 393 | Groundwater | 0 | 0 | 0 |
| The Water Company | Saipan Municipality | 310 | Purchased groundwater | 1 | 0 | 0 |
| Tinian Ice and Water | Tinian Municipality | 300 | Purchased groundwater | 0 | 0 | 0 |
| Marianas Ice and Water | Saipan Municipality | 300 | Purchased groundwater | 0 | 1 | 0 |
| Kensington Dormitory | Saipan Municipality | 260 | Groundwater | 0 | 1 | 0 |
| Rota Crystal | Rota Municipality | 226 | Purchased groundwater | 0 | 0 | 0 |
| 3K Ice and Water Company | Tinian Municipality | 208 | Purchased groundwater | 0 | 0 | 0 |
| Lao Lao Bay Golf Resort | Saipan Municipality | 200 | Groundwater | 0 | 0 | 0 |
Systems with unresolved health-based violations
10 systems| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Popz Purified Drinking Water | Saipan Municipality | 100 | Purchased groundwater | 0 | 4 | 0 |
| Kensington Hotel | Saipan Municipality | 634 | Groundwater | 0 | 3 | 0 |
| Tropical Drinking Water | Saipan Municipality | 47 | Groundwater | 1 | 3 | 0 |
| Saipan Ice and Water | Saipan Municipality | 3,101 | Groundwater | 0 | 1 | 0 |
| Star Water | Saipan Municipality | 1,522 | Groundwater | 0 | 1 | 0 |
| Marianas Ice and Water | Saipan Municipality | 300 | Purchased groundwater | 0 | 1 | 0 |
| Kensington Dormitory | Saipan Municipality | 260 | Groundwater | 0 | 1 | 0 |
| Black Micro Corporation Tinian | Saipan Municipality | 150 | Purchased groundwater | 0 | 1 | No inventory |
| San Jose Mart Water | Saipan Municipality | 130 | Purchased groundwater | 0 | 1 | 0 |
| Xu Sunshine Corp | Saipan Municipality | 79 | Purchased groundwater | 0 | 1 | No inventory |
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations