Is Caledonia, 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 ↓
90.4/100
waterverge.com Caledonia, MN — Water Quality Report
Caledonia's drinking water received a grade of A (90.4 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 2,824 residents using groundwater.
Lead levels were measured at 4.0 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 5 violations on record, including 1 health-based violation. 1 remains unresolved.
What to know about Caledonia's water
Caledonia ranks #201 out of 466 cities in Minnesota for water quality, placing it mid-range in the state.
Caledonia 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, Caledonia may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Caledonia, MN water safe to drink?
Caledonia's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (90.4/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 2,824 residents using groundwater (wells).
Recent water quality updates for Caledonia
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Caledonia's water quality assessment. Grade: A (90.4/100).
Federal disaster declaration (FEMA DR-4797). Flood event — may have impacted local water infrastructure.
Contaminants: Combined Radium (-226 and -228).
Federal disaster declaration (FEMA DR-4722). Flood event — may have impacted local water infrastructure.
Contaminants: Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228).
1 health-based. Contaminants: Tetrachloroethylene.
Key contaminant findings
Based on the most recent EPA sampling data for Caledonia's water supply.
Well within EPA limits.
Violation history
Caledonia's water system has 5 total violations on record, including 1 health-based violation. 1 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Houston County has experienced 10 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 Root River, South Fork Root River, Crooked Creek.
Where does Caledonia's water come from?
Caledonia's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,824 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Root River (river), South Fork Root River (river), Crooked Creek (river).
What Caledonia 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.
Caledonia'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 Caledonia
Industrial polluters nearby
Reported releases to surface water by facilities near Caledonia, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
NORTHERN ENGRAVING CORP SPRING GROVE, MN55974 | — | — | 8.1 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Houston County has experienced 10 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. | 4.0 | 15 | ppb | Inorganic | Safe |
Lead level (90th percentile)
Latest reading: 4.0 ppb (2023)
EPA action level: 15 ppb
See how Caledonia compares by contaminant
Explore where Caledonia ranks among all Minnesota cities for specific contaminants.
Water source & infrastructure
Where Caledonia's water comes from
Caledonia'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 2,824 people through 1 water system.
Water bodies near Caledonia
Caledonia is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Caledonia
| System Name | PWSID | Population | Source |
|---|---|---|---|
| Caledonia | MN1280002 | 2,824 | GW |
How Caledonia compares
Full Minnesota rankings →Caledonia's score of 90.4/100 is above the average of 82/100 among major Minnesota cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Minnesota rankings →About Caledonia, MN
Wikipedia →Caledonia is a city and the county seat of Houston County, Minnesota, United States and is part of the La Crosse, Wisconsin Metropolitan Statistical Area. The population was 2,847 at the 2020 census.
Learn more about your water
Guides and resources related to Caledonia's water quality findings.
Explore water quality across Houston
Frequently asked questions
Is Caledonia, MN tap water safe to drink?
Caledonia's water quality earned a grade of A (90.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #201 out of 466 cities tested in Minnesota.
What contaminants are in Caledonia's water?
Lead was measured at 4.0 ppb (90th percentile). 5 violations are on record.
How is Caledonia'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 Caledonia?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Caledonia's water come from?
Caledonia's water is sourced from Groundwater. The city has 1 water system serving approximately 2,824 residents.
What health violations has Caledonia's water system had?
Caledonia has 1 health-based violation on record. The most recent violation was recorded in October 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 1 violation remains unresolved.
Is Caledonia's groundwater at risk of contamination?
Caledonia 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 5 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 Caledonia's water compare to other cities?
Caledonia ranks #201 out of 466 cities in Minnesota (better than 57% of state cities) and #2229 out of 15744 cities nationally (86th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Caledonia's small water system affect quality?
Caledonia's system serves approximately 2,824 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 5 violations on record.