Is Pierz, 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 ↓
87.8/100
waterverge.com Pierz, MN — Water Quality Report
Pierz's drinking water received a grade of A- (87.8 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,500 residents using groundwater.
Lead levels were measured at 7.0 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 10 violations on record, including 0 health-based violations. All violations have been resolved.
What to know about Pierz's water
Pierz ranks #285 out of 466 cities in Minnesota for water quality, placing it below average in the state.
Pierz 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.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
As a small community water system, Pierz may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Pierz, MN water safe to drink?
Based on EPA testing data, Pierz's tap water is generally safe to drink. The water system earned a grade of A- (87.8/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 1,500 residents using groundwater (wells).
Recent water quality updates for Pierz
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Pierz's water quality assessment. Grade: A- (87.8/100).
Federal disaster declaration (FEMA DR-4722). Flood event — may have impacted local water infrastructure.
Contaminants: Chlorine, Revised Total Coliform Rule.
Contaminants: Coliform (TCR).
Federal disaster declaration (FEMA DR-3242). Hurricane event — may have impacted local water infrastructure.
Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Pierz's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Pierz's water system has 10 total violations on record, including 0 health-based violations. All violations have been resolved. 2 violations were issued in the last 5 years.
Flood & environmental risk
Morrison 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.
Where does Pierz's water come from?
Pierz's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,500 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Pierz 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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Pierz'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
Flood & disaster history
Morrison 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 Pierz'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. | 7.0 | 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. | 1.60 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 1.600 mg/L (1999)
EPA action level: 1.3 mg/L
See how Pierz compares by contaminant
Explore where Pierz ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Pierz's water comes from
Pierz'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 1,500 people through 1 water system.
Water systems serving Pierz
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Rich Prairie Sewer and Water District | MN1490004 | 1,500 | GW |
How Pierz compares
Full Minnesota rankings →Pierz's score of 87.8/100 is above the average of 82/100 among major Minnesota cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Pierz, MN
Learn more about your water
Guides and resources related to Pierz's water quality findings.
Explore water quality across Morrison
Frequently asked questions
Is Pierz, MN tap water safe to drink?
Pierz's water quality earned a grade of A- (87.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #285 out of 466 cities tested in Minnesota.
What contaminants are in Pierz's water?
Lead was measured at 7.0 ppb (90th percentile). 10 violations are on record.
How is Pierz'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 Pierz?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Pierz's water come from?
Pierz's water is sourced from Groundwater. The city has 1 water system serving approximately 1,500 residents.
Is Pierz's groundwater at risk of contamination?
Pierz 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 10 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 Pierz's water compare to other cities?
Pierz ranks #285 out of 466 cities in Minnesota (better than 39% of state cities) and #3828 out of 15744 cities nationally (76th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Pierz's small water system affect quality?
Pierz's system serves approximately 1,500 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 10 violations on record.