01The verdict: is Au Gres water safe?
Au Gres's tap water meets most EPA standards but has areas that warrant attention. With a grade of B+ (82.2/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 2 water systems serve approximately 1,011 residents using surface water (rivers, lakes, or reservoirs).
2 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 4.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓1 violation in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Au Gres's drinking water received a grade of B+ (82.2 out of 100), indicating good water quality. The city's 2 water systems serve approximately 1,011 residents using purchased surface water.
Lead levels were measured at 4.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 3 violations on record, including 1 health-based violation. 2 remain unresolved.
Au Gres ranks #324 out of 513 cities in Michigan for water quality, placing it below average in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. As a small community water system, Au Gres may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Au Gres's water
Every contaminant flagged in Au Gres, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 4.0 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Michigan
Cities ranked by compounds detected Cu Copper in Michigan
Cities ranked by 90th-percentile copper
03Au Gres's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 3 violations on record, including 1 health-based violation. 2 remain unresolved.
9 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 0 ppb since 2017. Latest reading: 2 ppb (2023) — 13% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Au Gres's water comes from
Au Gres's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
2 systems
2 water systems, operated under local government ownership.
1,011 people
Residents served across Au Gres's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 1,011 people through 2 water systems.
| System name | PWSID | Population | Source |
|---|---|---|---|
| AU GRES, CITY OF | MI0000280 | 945 | Purchased Surface Water |
| AU GRES TOWNSHIP | MI0000285 | 66 | Purchased Surface Water |
Water bodies near Au Gres
As a surface-water system, these water bodies may directly influence Au Gres's drinking water supply.
05Pressure on Au Gres's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Flood & storm history
4 federal disaster declarations on record for Arenac County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Au Gres compares
Scores for nearby Michigan cities on one line, with the average marked.
dashed line = Michigan average (70/100)
Au Gres scores 82.2/100 — above the Michigan average of 70/100. It outscores 5 of 10 nearby cities. Full Michigan rankings →
84.1 / 100BGrand Rapids, MI
70.2 / 100DAnn Arbor, MI
51.5 / 100CLansing, MI
57.3 / 100FKalamazoo, MI
35 / 100DFlint, MI
45.8 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Au Gres's water — not generic advice.
A basic carbon filter still helps
Au Gres's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Flush taps & check your service line
Lead leaches from pipes as water sits. Run cold water 30 seconds before drinking (especially mornings), and ask the utility whether your address still has a lead service line.
Lead risks explained →Watch for Au Gres alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Au Gres, MI tap water safe to drink?
Au Gres's water quality earned a grade of B+ (82.2/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #324 out of 513 cities tested in Michigan.
What contaminants are in Au Gres's water?
Lead was measured at 4.0 ppb (90th percentile). 3 violations are on record.
How is Au Gres's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Au Gres?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Au Gres's water come from?
Au Gres's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 1,011 residents.
What health violations has Au Gres's water system had?
Au Gres has 1 health-based violation on record. The most recent violation was recorded in August 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
How does Au Gres's water compare to other cities?
Au Gres ranks #324 out of 513 cities in Michigan (better than 37% of state cities) and #7049 out of 15382 cities nationally (54th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.