Is Petersburg, MI Tap Water Safe to Drink?
Graded B+ — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
84.9/100
waterverge.com Petersburg, MI — Water Quality Report
Petersburg's drinking water received a grade of B+ (84.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,115 residents using purchased surface water.
Lead levels were measured at 0.0 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 18 violations on record, including 9 health-based violations. 2 remain unresolved.
What to know about Petersburg's water
Petersburg ranks #248 out of 520 cities in Michigan for water quality, placing it mid-range 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, Petersburg may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Petersburg, MI water safe to drink?
Petersburg's tap water meets most EPA standards but has areas that warrant attention. With a grade of B+ (84.9/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 1,115 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Petersburg
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Petersburg's water quality assessment. Grade: B+ (84.9/100).
Federal disaster declaration (FEMA DR-4757). Flood event — may have impacted local water infrastructure.
Contaminants: Public Notice.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Total Haloacetic Acids (HAA5), TTHM.
Federal disaster declaration (FEMA DR-3225). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Petersburg's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Petersburg's water system has 18 total violations on record, including 9 health-based violations. 2 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Monroe County has experienced 5 federally declared disasters since 1972. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Petersburg's water come from?
Petersburg's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 1,115 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Petersburg residents can do
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Petersburg's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Petersburg
Industrial polluters nearby
Reported releases to surface water by facilities near Petersburg, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
FCA US DUNDEE ENGINE PLANT DUNDEE, MI48131 | — | — | 5.9 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Monroe County has experienced 5 federally declared disasters since 1972. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Petersburg's water supply, we recommend the following filter types.
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. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.62 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 2.620 mg/L (1993)
EPA action level: 1.3 mg/L
See how Petersburg compares by contaminant
Explore where Petersburg ranks among all Michigan cities for specific contaminants.
Water source & infrastructure
Where Petersburg's water comes from
Petersburg's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
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 1,115 people through 1 water system.
Water systems serving Petersburg
| System Name | PWSID | Population | Source |
|---|---|---|---|
| PETERSBURG | MI0005290 | 1,115 | SWP |
How Petersburg compares
Full Michigan rankings →Petersburg's score of 84.9/100 is above the average of 70/100 among major Michigan cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Michigan rankings →About Petersburg, MI
Wikipedia →Petersburg is a city in Monroe County in the U.S. state of Michigan. The population was 1,171 at the 2020 census.
Learn more about your water
Guides and resources related to Petersburg's water quality findings.
Explore water quality across Monroe
Frequently asked questions
Is Petersburg, MI tap water safe to drink?
Petersburg's water quality earned a grade of B+ (84.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #248 out of 520 cities tested in Michigan.
What contaminants are in Petersburg's water?
Lead was measured at 0.0 ppb (90th percentile). 18 violations are on record.
How is Petersburg'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 Petersburg?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Petersburg's water come from?
Petersburg's water is sourced from Purchased surface water. The city has 1 water system serving approximately 1,115 residents.
What health violations has Petersburg's water system had?
Petersburg has 9 health-based violations on record. The most recent violation was recorded in October 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2 violations remain unresolved.
How does Petersburg's water compare to other cities?
Petersburg ranks #248 out of 520 cities in Michigan (better than 52% of state cities) and #5626 out of 15744 cities nationally (64th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Petersburg's small water system affect quality?
Petersburg's system serves approximately 1,115 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 18 violations on record.