Is Oak Grove, MN Tap Water Safe to Drink?
Graded A-, with 1 unresolved violation on record. See what was cited — and what it means for your tap. What to do next ↓
88.5/100
waterverge.com Oak Grove, MN — Water Quality Report
Oak Grove's drinking water received a grade of A- (88.5 out of 100), indicating good water quality. The city's 1 water system serves approximately 623 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 4 violations on record, including 1 health-based violation. 1 remains unresolved.
What to know about Oak Grove's water
Oak Grove ranks #268 out of 466 cities in Minnesota for water quality, placing it below average in the state.
Oak Grove 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, Oak Grove may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Oak Grove, MN water safe to drink?
Oak Grove's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (88.5/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 623 residents using groundwater (wells).
Recent water quality updates for Oak Grove
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Oak Grove's water quality assessment. Grade: A- (88.5/100).
Contaminants: Revised Total Coliform Rule, Chlorine.
Contaminants: Lead and Copper Rule.
1 health-based. Contaminants: Arsenic.
Federal disaster declaration (FEMA DR-3242). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1370). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Oak Grove's water supply.
Well within EPA limits.
Violation history
Oak Grove's water system has 4 total violations on record, including 1 health-based violation. 1 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Anoka County has experienced 5 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 Mississippi River, Rum River, Coon Creek.
Where does Oak Grove's water come from?
Oak Grove's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 623 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), Rum River (river), Coon Creek (river).
What Oak Grove 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.
Oak Grove'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 Oak Grove
Industrial polluters nearby
Reported releases to surface water by facilities near Oak Grove, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CEMSTONE - EAST BETHEL EAST BETHEL, MN55005 | — | — | 6.4 mi |
BALLANTINE - DIV OF U.S. TSUBAKI ANOKA, MN55303 | — | — | 9.9 mi |
GRACO INC-ANOKA ANOKA, MN55303 | — | — | 9.8 mi |
NVENT HOFFMAN ANOKA, MN55303 | — | — | 8.2 mi |
LIFE FITNESS RAMSEY, MN55303 | — | — | 9.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Oak Grove
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.
- SOUTH ANDOVER SITE9.0 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Anoka County has experienced 5 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 trend (90th percentile)
See how Oak Grove compares by contaminant
Explore where Oak Grove ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Oak Grove's water comes from
Oak Grove'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 623 people through 1 water system.
Water bodies near Oak Grove
Oak Grove is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Oak Grove
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Oak Grove | MN1020044 | 623 | GW |
How Oak Grove compares
Full Minnesota rankings →Oak Grove's score of 88.5/100 is above the average of 82/100 among major Minnesota cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Oak Grove, MN
Learn more about your water
Guides and resources related to Oak Grove's water quality findings.
Explore water quality across Anoka
Frequently asked questions
Is Oak Grove, MN tap water safe to drink?
Oak Grove's water quality earned a grade of A- (88.5/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #268 out of 466 cities tested in Minnesota.
What contaminants are in Oak Grove's water?
Lead was measured at 0.0 ppb (90th percentile). 4 violations are on record.
How is Oak Grove'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 Oak Grove?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Oak Grove's water come from?
Oak Grove's water is sourced from Groundwater. The city has 1 water system serving approximately 623 residents.
What health violations has Oak Grove's water system had?
Oak Grove has 1 health-based violation on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 1 violation remains unresolved.
Is Oak Grove's groundwater at risk of contamination?
Oak Grove 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 4 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 Oak Grove's water compare to other cities?
Oak Grove ranks #268 out of 466 cities in Minnesota (better than 42% of state cities) and #3445 out of 15744 cities nationally (78th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Oak Grove's small water system affect quality?
Oak Grove's system serves approximately 623 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.