Is Cottrellville, MI Tap Water Safe to Drink?
Graded A-, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
87.4/100
waterverge.com Cottrellville, MI — Water Quality Report
Cottrellville's drinking water received a grade of A- (87.4 out of 100), indicating good water quality. The city's 1 water system serves approximately 3,200 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 4 violations on record, including 0 health-based violations. 2 remain unresolved.
What to know about Cottrellville's water
Cottrellville ranks #184 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, Cottrellville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Cottrellville, MI water safe to drink?
Cottrellville's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (87.4/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 3,200 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Cottrellville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Cottrellville's water quality assessment. Grade: A- (87.4/100).
Contaminants: Total Haloacetic Acids (HAA5), TTHM.
Contaminants: Consumer Confidence Rule.
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Cottrellville's water supply.
Well within EPA limits.
Violation history
Cottrellville's water system has 4 total violations on record, including 0 health-based violations. 2 remain unresolved. 2 violations were issued in the last 5 years.
Where does Cottrellville's water come from?
Cottrellville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 3,200 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Cottrellville 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.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
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 |
Lead level trend (90th percentile)
See how Cottrellville compares by contaminant
Explore where Cottrellville ranks among all Michigan cities for specific contaminants.
Water source & infrastructure
Where Cottrellville's water comes from
Cottrellville'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 3,200 people through 1 water system.
Water systems serving Cottrellville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| COTTRELLVILLE TOWNSHIP | MI0001650 | 3,200 | SWP |
How Cottrellville compares
Full Michigan rankings →Cottrellville's score of 87.4/100 is above the average of 70/100 among major Michigan cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Michigan rankings →About Cottrellville, MI
Wikipedia →Cottrellville Township is a civil township of St. Clair County in the U.S. state of Michigan. The population was 3,406 at the 2020 Census.
Learn more about your water
Guides and resources related to Cottrellville's water quality findings.
Explore water quality across St. Clair
Frequently asked questions
Is Cottrellville, MI tap water safe to drink?
Cottrellville's water quality earned a grade of A- (87.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #184 out of 520 cities tested in Michigan.
What contaminants are in Cottrellville's water?
Lead was measured at 0.0 ppb (90th percentile). 4 violations are on record.
How is Cottrellville'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 Cottrellville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Cottrellville's water come from?
Cottrellville's water is sourced from Purchased surface water. The city has 1 water system serving approximately 3,200 residents.
How does Cottrellville's water compare to other cities?
Cottrellville ranks #184 out of 520 cities in Michigan (better than 65% of state cities) and #4068 out of 15744 cities nationally (74th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Cottrellville's small water system affect quality?
Cottrellville's system serves approximately 3,200 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 4 violations on record.