Is Maple Plain, MN Tap Water Safe to Drink?
Graded A- — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
87.5/100
waterverge.com Maple Plain, MN — Water Quality Report
Maple Plain's drinking water received a grade of A- (87.5 out of 100), indicating good water quality. The city's 1 water system serves approximately 2,174 residents using groundwater.
Lead levels were measured at 1.0 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. 1 remains unresolved.
What to know about Maple Plain's water
Maple Plain ranks #294 out of 466 cities in Minnesota for water quality, placing it below average in the state.
Maple Plain 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, Maple Plain may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Maple Plain, MN water safe to drink?
Maple Plain's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (87.5/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 2,174 residents using groundwater (wells).
Recent water quality updates for Maple Plain
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Maple Plain's water quality assessment. Grade: A- (87.5/100).
Federal disaster declaration (FEMA DR-4290). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4182). Flood event — may have impacted local water infrastructure.
1 health-based. Contaminants: Combined Radium (-226 and -228).
Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Maple Plain'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
Maple Plain's water system has 3 total violations on record, including 1 health-based violation. 1 remain unresolved.
Flood & environmental risk
Hennepin County has experienced 8 federally declared disasters since 1965. 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 Crow River.
Where does Maple Plain's water come from?
Maple Plain's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,174 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Crow River (river).
What Maple Plain 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.
Maple Plain'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 Maple Plain
Industrial polluters nearby
Reported releases to surface water by facilities near Maple Plain, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CEMSTONE - DELANO DELANO, MN55328 | — | — | 5.8 mi |
EASIWAY SYSTEMS INC. DELANO, MN55328 | — | — | 6.4 mi |
MACDERMID ENTHONE AMERICA LLC MAPLE PLAIN, MN55359 | — | — | 0.3 mi |
KINGSPAN INSULATION LLC ROCKFORD, MN55373 | — | — | 6.6 mi |
OMG BUILDING PRODUCTS LLC ROCKFORD, MN55373 | — | — | 7.6 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Maple Plain
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- SPRING PARK MUNICIPAL WELL FIELD5.2 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Hennepin County has experienced 8 federally declared disasters since 1965. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Maple Plain'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. | 1.0 | 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. | 2.30 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 2.300 mg/L (1993)
EPA action level: 1.3 mg/L
See how Maple Plain compares by contaminant
Explore where Maple Plain ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Maple Plain's water comes from
Maple Plain'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 2,174 people through 1 water system.
Water bodies near Maple Plain
Maple Plain is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Maple Plain
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Maple Plain | MN1270021 | 2,174 | GW |
How Maple Plain compares
Full Minnesota rankings →Maple Plain's score of 87.5/100 is above the average of 82/100 among major Minnesota cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Maple Plain, MN
Wikipedia →Maple Plain is a city in Hennepin County, Minnesota, United States. The population was 1,743 at the 2020 census.
Learn more about your water
Guides and resources related to Maple Plain's water quality findings.
Explore water quality across Hennepin
Frequently asked questions
Is Maple Plain, MN tap water safe to drink?
Maple Plain's water quality earned a grade of A- (87.5/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #294 out of 466 cities tested in Minnesota.
What contaminants are in Maple Plain's water?
Lead was measured at 1.0 ppb (90th percentile). 3 violations are on record.
How is Maple Plain'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 Maple Plain?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Maple Plain's water come from?
Maple Plain's water is sourced from Groundwater. The city has 1 water system serving approximately 2,174 residents.
What health violations has Maple Plain's water system had?
Maple Plain has 1 health-based violation on record. The most recent violation was recorded in February 2013. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 1 violation remains unresolved.
Is Maple Plain's groundwater at risk of contamination?
Maple Plain 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 3 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 Maple Plain's water compare to other cities?
Maple Plain ranks #294 out of 466 cities in Minnesota (better than 37% of state cities) and #4021 out of 15744 cities nationally (75th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Maple Plain's small water system affect quality?
Maple Plain's system serves approximately 2,174 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 3 violations on record.