Is Long Lake, MN 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 ↓
91.2/100
waterverge.com Long Lake, MN — Water Quality Report
Long Lake's drinking water received a grade of A (91.2 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,729 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 7 violations on record, including 0 health-based violations. 2 remain unresolved.
What to know about Long Lake's water
Long Lake ranks #177 out of 466 cities in Minnesota for water quality, placing it mid-range in the state.
Long Lake 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, Long Lake may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Long Lake, MN water safe to drink?
Long Lake's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (91.2/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 1,729 residents using groundwater (wells).
Recent water quality updates for Long Lake
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Long Lake's water quality assessment. Grade: A (91.2/100).
Contaminants: Lead and Copper Rule.
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.
Contaminants: Coliform (TCR).
Contaminants: Chlorine.
Key contaminant findings
Based on the most recent EPA sampling data for Long Lake's water supply.
Well within EPA limits.
Violation history
Long Lake's water system has 7 total violations on record, including 0 health-based violations. 2 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 Lake Minnetonka, Minnehaha Creek.
Where does Long Lake's water come from?
Long Lake's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,729 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Lake Minnetonka (lake), Minnehaha Creek (river).
What Long Lake 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.
Long Lake'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 Long Lake
Industrial polluters nearby
Reported releases to surface water by facilities near Long Lake, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
BOSTON SCIENTIFIC WEAVER LAKE CAMPUS MAPLE GROVE, MN55311 | — | — | 9.6 mi |
ROBERTS AUTOMATIC PRODUCTS CHANHASSEN, MN55317 | — | — | 8.8 mi |
EMERSON AUTOMATION SOLUTIONS ROSEMOUNT INC CHANHASSEN, MN55317 | — | — | 8.9 mi |
PROTECH INTERCONNECT SOLUTIONS LLC CHASKA, MN55318 | — | — | 9.0 mi |
LIFECORE BIOMEDICAL LLC CHASKA, MN55318 | — | — | 9.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Long Lake
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 FIELD4.5 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.
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 Long Lake compares by contaminant
Explore where Long Lake ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Long Lake's water comes from
Long Lake'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 1,729 people through 1 water system.
Water bodies near Long Lake
Long Lake is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Long Lake
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Long Lake | MN1270018 | 1,729 | GW |
How Long Lake compares
Full Minnesota rankings →Long Lake's score of 91.2/100 is above the average of 82/100 among major Minnesota cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Long Lake, MN
Wikipedia →Long Lake is a small city in Hennepin County, Minnesota, United States named after the lake the eastern end of town lies on. A commercial hub for the surrounding communities, Long Lake is home to many local shops and businesses. U.S. Highway 12 runs through the town. The population was 1,741 at the 2020 census.
Learn more about your water
Guides and resources related to Long Lake's water quality findings.
Explore water quality across Hennepin
Frequently asked questions
Is Long Lake, MN tap water safe to drink?
Long Lake's water quality earned a grade of A (91.2/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #177 out of 466 cities tested in Minnesota.
What contaminants are in Long Lake's water?
Lead was measured at 0.0 ppb (90th percentile). 7 violations are on record.
How is Long Lake'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 Long Lake?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Long Lake's water come from?
Long Lake's water is sourced from Groundwater. The city has 1 water system serving approximately 1,729 residents.
Is Long Lake's groundwater at risk of contamination?
Long Lake 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 7 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 Long Lake's water compare to other cities?
Long Lake ranks #177 out of 466 cities in Minnesota (better than 62% of state cities) and #1824 out of 15744 cities nationally (88th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Long Lake's small water system affect quality?
Long Lake's system serves approximately 1,729 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 7 violations on record.