Is Constantine, MI Tap Water Safe to Drink?
Graded B, with 10 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
79.6/100
waterverge.com Constantine, MI — Water Quality Report
Constantine's drinking water received a grade of B (79.6 out of 100), indicating good water quality. The city's 3 water systems serve approximately 2,305 residents using groundwater.
Lead levels were measured at 5.0 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 104 violations on record, including 13 health-based violations. 10 remain unresolved.
What to know about Constantine's water
Constantine ranks #360 out of 520 cities in Michigan for water quality, placing it below average in the state.
Constantine relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Constantine may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Constantine, MI water safe to drink?
Constantine's drinking water has significant quality concerns based on EPA testing data. With a grade of B (79.6/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 2,305 residents using groundwater (wells).
Recent water quality updates for Constantine
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Constantine's water quality assessment. Grade: B (79.6/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Constantine's water supply.
Well within EPA limits.
Violation history
Constantine's water system has 104 total violations on record, including 13 health-based violations. 10 remain unresolved. 4 violations were issued in the last 5 years.
Where does Constantine's water come from?
Constantine's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 2,305 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Portage River (river), St. Joseph River (river), Mill Creek (river), Pigeon River (river).
What Constantine residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Constantine's water.
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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
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 Constantine
Industrial polluters nearby
Reported releases to surface water by facilities near Constantine, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
OX ENGINEERED PRODUCTS INC CONSTANTINE, MI49042 | — | — | 0.5 mi |
MICHIGAN MILK PRODUCERS ASSOC CONSTANTINE, MI49042 | — | — | 0.4 mi |
METAL TECHNOLOGIES INC THREE RIVERS GRAY IRON THREE RIVERS, MI49093 | — | — | 7.2 mi |
AMERICAN AXLE & MANUFACTURING INC THREE RIVERS, MI49093 | — | — | 8.2 mi |
KADANT JOHNSON INC THREE RIVERS, MI49093 | — | — | 8.0 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
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. | 5.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Constantine compares by contaminant
Explore where Constantine ranks among all Michigan cities for specific contaminants.
Water source & infrastructure
Where Constantine's water comes from
Constantine's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 2,305 people through 3 water systems.
Water bodies near Constantine
Constantine is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Constantine
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CONSTANTINE | MI0001600 | 2,075 | GW |
| OAKWOOD MHP | OH8601212 | 180 | GW |
| NORTH PINE ESTATES | OH8600812 | 50 | GW |
How Constantine compares
Full Michigan rankings →Constantine's score of 79.6/100 is above the average of 70/100 among major Michigan cities. It outscores 5 of 10 nearby cities.
Nearby cities
View Michigan rankings →About Constantine, MI
Learn more about your water
Guides and resources related to Constantine's water quality findings.
Explore water quality across St. Joseph
Frequently asked questions
Is Constantine, MI tap water safe to drink?
Constantine's water quality earned a grade of B (79.6/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #360 out of 520 cities tested in Michigan.
What contaminants are in Constantine's water?
Lead was measured at 5.0 ppb (90th percentile). 104 violations are on record.
How is Constantine'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 Constantine?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Constantine's water come from?
Constantine's water is sourced from Groundwater. The city has 3 water systems serving approximately 2,305 residents.
What health violations has Constantine's water system had?
Constantine has 13 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 10 violations remain unresolved.
Is Constantine's groundwater at risk of contamination?
Constantine uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 104 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Constantine's water compare to other cities?
Constantine ranks #360 out of 520 cities in Michigan (better than 31% of state cities) and #8196 out of 15744 cities nationally (48th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.