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States → Northern Mariana Islands

Non-Transient Non-Community Water System · PWS MP0000026

Grandvrio Resort

Saipan, Northern Mariana Islands 96950 - drinking water served from groundwater sources to 409 people, tracked in EPA SDWIS and UCMR5.

409
People served
62
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 62 drinking-water violations at Grandvrio Resort, 3% of them health-based - below the Northern Mariana Islands per-system average.

62
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
409
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Grandvrio Resort

Grandvrio Resort is a private-owned non-transient non-community water system that delivers drinking water to 409 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 62 total violations for this system , of which 2 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 59 monitoring and reporting violations are on file. The most recent violation on record dates to 2007.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 6 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%).

Grandvrio Resort's 62 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
409
Total Violations
62
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
School/Daycare
No
MCL Violations
2
Monitoring Violations
59
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 6 2002
Coliform (TCR) MCL 2 2007
Nitrate MR 1 2001
Toxaphene MR 1 2001
Dalapon MR 1 2001
Diquat MR 1 2001
Di(2-ethylhexyl) adipate MR 1 2001
OXAMYL MR 1 2001
Simazine MR 1 2001
Hexachlorocyclopentadiene MR 1 2001
Carbofuran MR 1 2001
Atrazine MR 1 2001
LASSO MR 1 2001
2,3,7,8-TCDD MR 1 2001
2,4,5-TP MR 1 2001
HEXACHLOROBENZENE MR 1 2001
Benzo(a)pyrene MR 1 2001
Pentachlorophenol MR 1 2001
1,2-DIBROMO-3-CHLOROPROPANE MR 1 2001
ETHYLENE DIBROMIDE MR 1 2001
o-Dichlorobenzene MR 1 2001
Vinyl chloride MR 1 2001
trans-1,2-Dichloroethylene MR 1 2001
1,2-Dichloroethane MR 1 2001
1,1,1-Trichloroethane MR 1 2001
Carbon tetrachloride MR 1 2001
1,2-Dichloropropane MR 1 2001
1,1,2-Trichloroethane MR 1 2001
Toluene MR 1 2001
Ethylbenzene MR 1 2001

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 Grandvrio Resort.

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 MP0000026 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
2007 Coliform (TCR) MCL 2 SDWIS / MP0000026 / 3100
2002 Lead and Copper Rule MR 6 SDWIS / MP0000026 / 5000
2001 Nitrate MR 1 SDWIS / MP0000026 / 1040
2001 Toxaphene MR 1 SDWIS / MP0000026 / 2020
2001 Dalapon MR 1 SDWIS / MP0000026 / 2031
2001 Diquat MR 1 SDWIS / MP0000026 / 2032
2001 Di(2-ethylhexyl) adipate MR 1 SDWIS / MP0000026 / 2035
2001 OXAMYL MR 1 SDWIS / MP0000026 / 2036
2001 Simazine MR 1 SDWIS / MP0000026 / 2037
2001 Hexachlorocyclopentadiene MR 1 SDWIS / MP0000026 / 2042
2001 Carbofuran MR 1 SDWIS / MP0000026 / 2046
2001 Atrazine MR 1 SDWIS / MP0000026 / 2050
2001 LASSO MR 1 SDWIS / MP0000026 / 2051
2001 2,3,7,8-TCDD MR 1 SDWIS / MP0000026 / 2063
2001 2,4,5-TP MR 1 SDWIS / MP0000026 / 2110

How Grandvrio Resort Compares

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

Metric Grandvrio Resort Northern Mariana Islands avg Federal benchmark
Total violations 62 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 409 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 Grandvrio Resort water safe to drink? ▼
Grandvrio Resort (PWS ID: MP0000026) has 62 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 409 people using Groundwater sources.
How many people does Grandvrio Resort serve? ▼
Grandvrio Resort serves 409 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 Grandvrio Resort have? ▼
Grandvrio Resort has 62 total violations: 2 health-based violations (MCL exceedances or treatment failures), 59 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Grandvrio Resort water? ▼
No PFAS testing data is available for Grandvrio Resort under the EPA's UCMR5 monitoring program.
What water source does Grandvrio Resort use? ▼
Grandvrio Resort uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.