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Community Water System · PWS MP0000068

Tinian Ice And Water

Tinian, Northern Mariana Islands 96952 - drinking water served from groundwater sources to 300 people, tracked in EPA SDWIS and UCMR5.

300
People served
155
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 155 drinking-water violations at Tinian Ice And Water, 1% of them health-based - above the Northern Mariana Islands per-system average.

155
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
300
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tinian Ice And Water

Tinian Ice And Water is a private-owned community water system that delivers drinking water to 300 residents in Tinian, Northern Mariana Islands through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 155 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 150 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 Lead and Copper Rule, recorded in 13 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%).

Tinian Ice And Water's 155 violations sit above 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
300
Total Violations
155
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1
School/Daycare
No
MCL Violations
2
Monitoring Violations
150
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 13 2020
Nitrate-Nitrite MR 8 2008
Nitrate MR 3 2022
Arsenic MR 2 2020
Barium MR 2 2020
Cadmium MR 2 2020
Chromium MR 2 2020
CYANIDE MR 2 2020
Fluoride MR 2 2020
Mercury MR 2 2020
Selenium MR 2 2020
Antimony, Total MR 2 2020
Thallium, Total MR 2 2020
Endrin MR 2 2020
BHC-GAMMA MR 2 2020
Methoxychlor MR 2 2020
Dalapon MR 2 2020
Simazine MR 2 2020
Picloram MR 2 2020
Dinoseb MR 2 2020
Hexachlorocyclopentadiene MR 2 2020
Atrazine MR 2 2020
Heptachlor MR 2 2020
Heptachlor epoxide MR 2 2020
2,4,5-TP MR 2 2020
HEXACHLOROBENZENE MR 2 2020
Benzo(a)pyrene MR 2 2020
1,2,4-Trichlorobenzene MR 2 2020
cis-1,2-Dichloroethylene MR 2 2020
Total Polychlorinated Biphenyls (PCB) MR 2 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 Tinian Ice And 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 MP0000068 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 2 SDWIS / MP0000068 / 8000
2022 Nitrate MR 3 SDWIS / MP0000068 / 1040
2020 Lead and Copper Rule MR 13 SDWIS / MP0000068 / 5000
2020 Arsenic MR 2 SDWIS / MP0000068 / 1005
2020 Barium MR 2 SDWIS / MP0000068 / 1010
2020 Cadmium MR 2 SDWIS / MP0000068 / 1015
2020 Chromium MR 2 SDWIS / MP0000068 / 1020
2020 CYANIDE MR 2 SDWIS / MP0000068 / 1024
2020 Fluoride MR 2 SDWIS / MP0000068 / 1025
2020 Mercury MR 2 SDWIS / MP0000068 / 1035
2020 Selenium MR 2 SDWIS / MP0000068 / 1045
2020 Antimony, Total MR 2 SDWIS / MP0000068 / 1074
2020 Thallium, Total MR 2 SDWIS / MP0000068 / 1085
2020 Endrin MR 2 SDWIS / MP0000068 / 2005
2020 BHC-GAMMA MR 2 SDWIS / MP0000068 / 2010

How Tinian Ice And Water Compares

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

Metric Tinian Ice And Water Northern Mariana Islands avg Federal benchmark
Total violations 155 73 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 300 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 Tinian Ice And Water water safe to drink? ▼
Tinian Ice And Water (PWS ID: MP0000068) has 155 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does Tinian Ice And Water serve? ▼
Tinian Ice And Water serves 300 people in Tinian, Northern Mariana Islands. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Tinian Ice And Water have? ▼
Tinian Ice And Water has 155 total violations: 2 health-based violations (MCL exceedances or treatment failures), 150 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tinian Ice And Water water? ▼
No PFAS testing data is available for Tinian Ice And Water under the EPA's UCMR5 monitoring program.
What water source does Tinian Ice And Water use? ▼
Tinian Ice And 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.