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States → Northern Mariana Islands

Community Water System · PWS MP0000160

Star Water

Saipan, Northern Mariana Islands 96950 - drinking water served from groundwater sources to 1,522 people, tracked in EPA SDWIS and UCMR5.

1,522
People served
68
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 68 drinking-water violations at Star Water - below the Northern Mariana Islands per-system average.

68
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
1,522
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Star Water

Star Water is a private-owned community water system that delivers drinking water to 1,522 residents in Saipan, Northern Mariana Islands through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 68 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 67 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 2 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Northern Mariana Islands, EPA tracks 60 public water systems serving 70,193 people, with 4,377 cumulative violations and 163 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 73 violations. Statewide, 1 of 2 UCMR5-tested systems have reported PFAS detections (50%).

Star Water's 68 violations sit below the Northern Mariana Islands average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,522
Total Violations
68
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1
School/Daycare
No
MCL Violations
0
Monitoring Violations
67
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MR 2 2022
TTHM MR 2 2022
Arsenic MR 1 2020
Barium MR 1 2020
CYANIDE MR 1 2020
Fluoride MR 1 2020
Nitrate MR 1 2022
Selenium MR 1 2020
Endrin MR 1 2020
BHC-GAMMA MR 1 2020
Toxaphene MR 1 2020
Di(2-ethylhexyl) adipate MR 1 2020
OXAMYL MR 1 2020
Simazine MR 1 2020
Di(2-ethylhexyl) phthalate MR 1 2020
Hexachlorocyclopentadiene MR 1 2020
Carbofuran MR 1 2020
LASSO MR 1 2020
2,4,5-TP MR 1 2020
Benzo(a)pyrene MR 1 2020
Pentachlorophenol MR 1 2020
1,2,4-Trichlorobenzene MR 1 2020
cis-1,2-Dichloroethylene MR 1 2020
ETHYLENE DIBROMIDE MR 1 2020
Chlordane MR 1 2020
trans-1,2-Dichloroethylene MR 1 2020
1,2-Dichloroethane MR 1 2020
Trichloroethylene MR 1 2020
1,1,2-Trichloroethane MR 1 2020
Toluene MR 1 2020

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Star Water.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MP0000160 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Northern Mariana Islands Drinking Water Authority

Northern Mariana Islands's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find MP regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 Revised Total Coliform Rule RPT 1 SDWIS / MP0000160 / 8000
2022 Total Haloacetic Acids (HAA5) MR 2 SDWIS / MP0000160 / 2456
2022 TTHM MR 2 SDWIS / MP0000160 / 2950
2022 Nitrate MR 1 SDWIS / MP0000160 / 1040
2020 Arsenic MR 1 SDWIS / MP0000160 / 1005
2020 Barium MR 1 SDWIS / MP0000160 / 1010
2020 CYANIDE MR 1 SDWIS / MP0000160 / 1024
2020 Fluoride MR 1 SDWIS / MP0000160 / 1025
2020 Selenium MR 1 SDWIS / MP0000160 / 1045
2020 Endrin MR 1 SDWIS / MP0000160 / 2005
2020 BHC-GAMMA MR 1 SDWIS / MP0000160 / 2010
2020 Toxaphene MR 1 SDWIS / MP0000160 / 2020
2020 Di(2-ethylhexyl) adipate MR 1 SDWIS / MP0000160 / 2035
2020 OXAMYL MR 1 SDWIS / MP0000160 / 2036
2020 Simazine MR 1 SDWIS / MP0000160 / 2037

How Star Water Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Star Water Northern Mariana Islands avg Federal benchmark
Total violations 68 73 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 2.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 50% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,522 1,170 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 60 regulated public water systems in Northern Mariana Islands.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Star Water water safe to drink? ▼
Star Water (PWS ID: MP0000160) has 68 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,522 people using Groundwater sources.
How many people does Star Water serve? ▼
Star Water serves 1,522 people in Saipan, Northern Mariana Islands. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Star Water have? ▼
Star Water has 68 total violations: 0 health-based violations (MCL exceedances or treatment failures), 67 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Star Water water? ▼
No PFAS testing data is available for Star Water under the EPA's UCMR5 monitoring program.
What water source does Star Water use? ▼
Star Water uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.