Is Cohasset, MN Tap Water Safe to Drink?
Graded A+ with no contaminants above EPA limits. Here's everything we tested and how Cohasset ranks. What to do next ↓
96.9/100
waterverge.com Cohasset, MN — Water Quality Report
Cohasset's drinking water received a grade of A+ (96.9 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,000 residents using groundwater.
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 2 violations on record, including 0 health-based violations. All violations have been resolved.
What to know about Cohasset's water
Cohasset ranks #21 out of 466 cities in Minnesota for water quality, placing it one of the best in the state.
Cohasset 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, Cohasset may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Cohasset, MN water safe to drink?
Based on EPA testing data, Cohasset's tap water is generally safe to drink. The water system earned a grade of A+ (96.9/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 1,000 residents using groundwater (wells).
Recent water quality updates for Cohasset
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Cohasset's water quality assessment. Grade: A+ (96.9/100).
Federal disaster declaration (FEMA DR-4797). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4390). Flood event — may have impacted local water infrastructure.
Contaminants: Chlorine.
Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Cohasset's water supply.
Well within EPA limits.
Violation history
Cohasset's water system has 2 total violations on record, including 0 health-based violations. All violations have been resolved.
Flood & environmental risk
Itasca County has experienced 6 federally declared disasters since 1966. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Mississippi River.
Where does Cohasset's water come from?
Cohasset's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,000 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Mississippi River (river).
What Cohasset 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.
Cohasset'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 Cohasset
Industrial polluters nearby
Reported releases to surface water by facilities near Cohasset, ranked by pounds discharged annually.
Total reported releases to surface water: 5,314 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
BOSWELL ENERGY CENTER COHASSET, MN55721 | Manganese compounds | 5,314 | 1.9 mi |
BLANDIN PAPER CO GRAND RAPIDS, MN55744 | — | — | 6.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtItasca County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Itasca County has experienced 6 federally declared disasters since 1966. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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 (90th percentile)
Latest reading: 0.0 ppb (2023)
EPA action level: 15 ppb
See how Cohasset compares by contaminant
Explore where Cohasset ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Cohasset's water comes from
Cohasset'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 1,000 people through 1 water system.
Water bodies near Cohasset
Cohasset is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Cohasset
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Cohasset Municipal Water System | MN1310035 | 1,000 | GW |
How Cohasset compares
Full Minnesota rankings →Cohasset's score of 96.9/100 is above the average of 82/100 among major Minnesota cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Cohasset, MN
Learn more about your water
Guides and resources related to Cohasset's water quality findings.
Explore water quality across Itasca
Frequently asked questions
Is Cohasset, MN tap water safe to drink?
Cohasset's water quality earned a grade of A+ (96.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #21 out of 466 cities tested in Minnesota.
What contaminants are in Cohasset's water?
Lead was measured at 0.0 ppb (90th percentile). 2 violations are on record.
How is Cohasset'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 Cohasset?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Cohasset's water come from?
Cohasset's water is sourced from Groundwater. The city has 1 water system serving approximately 1,000 residents.
Is Cohasset's groundwater at risk of contamination?
Cohasset 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 2 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 Cohasset's water compare to other cities?
Cohasset ranks #21 out of 466 cities in Minnesota (better than 95% of state cities) and #129 out of 15744 cities nationally (99th percentile). The grade of A+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Cohasset's small water system affect quality?
Cohasset's system serves approximately 1,000 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 2 violations on record.