ONAWAY, CITY OF
PWS ID: MI0005010 · ONAWAY, Michigan 49765
ONAWAY, CITY OF serves 880 people in ONAWAY, Michigan using Groundwater water sources. It has 48 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: ONAWAY, CITY OF
ONAWAY, CITY OF is a local-owned community water system that delivers drinking water to 880 residents in ONAWAY, Michigan (Presque Isle County) through 510 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 48 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 32 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), 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 Michigan, EPA tracks 10,959 public water systems serving 9,098,093 people, with 255,201 cumulative violations and 31,467 health-based violations on record. About 86% of systems in the state carry at least one violation, and state-wide the average per system is 23.3 violations. ONAWAY, CITY OF's 48 violations sit above the Michigan average. Statewide, 87 of 318 UCMR5-tested systems have reported PFAS detections (27.4%). 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
- Local
- Connections
- 510
- County
- Presque Isle
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 32
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MR | 13 | 2018 |
| TTHM | MR | 9 | 2015 |
| Revised Total Coliform Rule | RPT | 7 | 2024 |
| Consumer Confidence Rule | Other | 3 | 2008 |
| Combined Uranium | MR | 3 | 2016 |
| Lead and Copper Rule | MR | 3 | 2019 |
| Chlorine | MR | 3 | 2018 |
| Nitrate | MR | 1 | 1999 |
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 ONAWAY, CITY OF.
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 MI0005010 on SDWISSource: EPA SDWIS Federal Reports Search
Michigan Drinking Water Authority
Michigan EGLE — Drinking Water and Environmental Health Division is the primacy agency that licenses and inspects ONAWAY, CITY OF under EPA-delegated authority.
Open MI regulator portalSource: Michigan EGLE — Drinking Water and Environmental Health Division
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 |
|---|---|---|---|---|
| 2024 | Revised Total Coliform Rule | RPT | 7 | SDWIS / MI0005010 / 8000 |
| 2019 | Lead and Copper Rule | MR | 3 | SDWIS / MI0005010 / 5000 |
| 2018 | Total Haloacetic Acids (HAA5) | MR | 13 | SDWIS / MI0005010 / 2456 |
| 2018 | Chlorine | MR | 3 | SDWIS / MI0005010 / 0999 |
| 2016 | Combined Uranium | MR | 3 | SDWIS / MI0005010 / 4006 |
| 2015 | TTHM | MR | 9 | SDWIS / MI0005010 / 2950 |
| 2008 | Consumer Confidence Rule | Other | 3 | SDWIS / MI0005010 / 7000 |
| 1999 | Nitrate | MR | 1 | SDWIS / MI0005010 / 1040 |
How ONAWAY, CITY OF Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | ONAWAY, CITY OF | Michigan avg | Federal benchmark |
|---|---|---|---|
| Total violations | 48 | 23.3 | SDWA compliance — any non-zero count is a recorded breach |
| Health-based violations | 0 | 2.9 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 27.4% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 880 | 830 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,959 regulated public water systems in Michigan.
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 |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is ONAWAY, CITY OF water safe to drink? ▼
How many people does ONAWAY, CITY OF serve? ▼
What type of violations does ONAWAY, CITY OF have? ▼
Has PFAS been detected in ONAWAY, CITY OF water? ▼
What water source does ONAWAY, CITY OF use? ▼
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Read our methodology — how this data is sourced, computed, and verified.