Community Water System · PWS MP0000248
Black Micro Corporation Tinian
Saipan, Northern Mariana Islands 96950 - drinking water served from groundwater sources to 150 people, tracked in EPA SDWIS and UCMR5.
- 150
- People served
- 58
- EPA violations
- 0
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 58 drinking-water violations at Black Micro Corporation Tinian - below the Northern Mariana Islands per-system average.
- 58
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
- 150
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Black Micro Corporation Tinian
Black Micro Corporation Tinian is a private-owned community water system that delivers drinking water to 150 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 58 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 57 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.
The most frequently cited contaminant at this system is Lead and Copper Rule, 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%).
Black Micro Corporation Tinian's 58 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.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 57
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 2 | 2025 |
| Nitrate | MR | 1 | 2024 |
| BHC-GAMMA | MR | 1 | 2024 |
| Methoxychlor | MR | 1 | 2024 |
| Toxaphene | MR | 1 | 2024 |
| Picloram | MR | 1 | 2024 |
| Dinoseb | MR | 1 | 2024 |
| Carbofuran | MR | 1 | 2024 |
| Atrazine | MR | 1 | 2024 |
| Heptachlor | MR | 1 | 2024 |
| Heptachlor epoxide | MR | 1 | 2024 |
| 2,4,5-TP | MR | 1 | 2024 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2024 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2024 |
| Xylenes, Total | MR | 1 | 2024 |
| Chlordane | MR | 1 | 2024 |
| DICHLOROMETHANE | MR | 1 | 2024 |
| o-Dichlorobenzene | MR | 1 | 2024 |
| 1,1-Dichloroethylene | MR | 1 | 2024 |
| trans-1,2-Dichloroethylene | MR | 1 | 2024 |
| 1,1,1-Trichloroethane | MR | 1 | 2024 |
| 1,2-Dichloropropane | MR | 1 | 2024 |
| Trichloroethylene | MR | 1 | 2024 |
| Tetrachloroethylene | MR | 1 | 2024 |
| Benzene | MR | 1 | 2024 |
| Toluene | MR | 1 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 2024 |
| Combined Uranium | MR | 1 | 2024 |
| Gross Beta Particle Activity | MR | 1 | 2024 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2024 |
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 Black Micro Corporation Tinian.
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 MP0000248 on SDWISSource: EPA SDWIS Federal Reports Search
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 SDWISViolation 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 |
|---|---|---|---|---|
| 2025 | Lead and Copper Rule | MR | 2 | SDWIS / MP0000248 / 5000 |
| 2024 | Nitrate | MR | 1 | SDWIS / MP0000248 / 1040 |
| 2024 | BHC-GAMMA | MR | 1 | SDWIS / MP0000248 / 2010 |
| 2024 | Methoxychlor | MR | 1 | SDWIS / MP0000248 / 2015 |
| 2024 | Toxaphene | MR | 1 | SDWIS / MP0000248 / 2020 |
| 2024 | Picloram | MR | 1 | SDWIS / MP0000248 / 2040 |
| 2024 | Dinoseb | MR | 1 | SDWIS / MP0000248 / 2041 |
| 2024 | Carbofuran | MR | 1 | SDWIS / MP0000248 / 2046 |
| 2024 | Atrazine | MR | 1 | SDWIS / MP0000248 / 2050 |
| 2024 | Heptachlor | MR | 1 | SDWIS / MP0000248 / 2065 |
| 2024 | Heptachlor epoxide | MR | 1 | SDWIS / MP0000248 / 2067 |
| 2024 | 2,4,5-TP | MR | 1 | SDWIS / MP0000248 / 2110 |
| 2024 | Total Polychlorinated Biphenyls (PCB) | MR | 1 | SDWIS / MP0000248 / 2383 |
| 2024 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | SDWIS / MP0000248 / 2931 |
| 2024 | Xylenes, Total | MR | 1 | SDWIS / MP0000248 / 2955 |
How Black Micro Corporation Tinian Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Black Micro Corporation Tinian | Northern Mariana Islands avg | Federal benchmark |
|---|---|---|---|
| Total violations | 58 | 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 | 150 | 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 Black Micro Corporation Tinian water safe to drink? ▼
How many people does Black Micro Corporation Tinian serve? ▼
What type of violations does Black Micro Corporation Tinian have? ▼
Has PFAS been detected in Black Micro Corporation Tinian water? ▼
What water source does Black Micro Corporation Tinian use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
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.