Is Lomira, WI Tap Water Safe to Drink?
Graded B+, with 6 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
82.8/100
waterverge.com Lomira, WI — Water Quality Report
Lomira's drinking water received a grade of B+ (82.8 out of 100), indicating good water quality. The city's 1 water system serves approximately 2,701 residents using groundwater.
Lead levels were measured at 8.2 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 48 violations on record, including 7 health-based violations. 6 remain unresolved.
What to know about Lomira's water
Lomira ranks #211 out of 446 cities in Wisconsin for water quality, placing it mid-range in the state.
Lomira 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, Lomira may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Lomira, WI water safe to drink?
Lomira's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (82.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,701 residents using groundwater (wells).
Recent water quality updates for Lomira
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lomira's water quality assessment. Grade: B+ (82.8/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Groundwater Rule.
Federal disaster declaration (FEMA DR-3249). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-775). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Lomira'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.
Violation history
Lomira's water system has 48 total violations on record, including 7 health-based violations. 6 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Dodge County has experienced 3 federally declared disasters since 1976. 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 Lomira's water come from?
Lomira's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,701 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Lomira residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Lomira's water.
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.
Lomira'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 Lomira
Industrial polluters nearby
Reported releases to surface water by facilities near Lomira, ranked by pounds discharged annually.
Total reported releases to surface water: 60,348 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
GRANDE CHEESE CO BROWNSVILLE BROWNSVILLE, WI53006 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 60,348 | 5.2 mi |
KONDEX CORP LOMIRA, WI53048 | — | — | 0.8 mi |
QUAD/GRAPHICS INC. LOMIRA, WI53048 | — | — | 2.1 mi |
GLEASON REEL MAYVILLE, WI53050 | — | — | 9.3 mi |
METALCRAFT OF MAYVILLE MAYVILLE, WI53050 | — | — | 7.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Dodge County has experienced 3 federally declared disasters since 1976. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Lomira'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. | 8.2 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Lomira compares by contaminant
Explore where Lomira ranks among all Wisconsin cities for specific contaminants.
Water source & infrastructure
Where Lomira's water comes from
Lomira'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 2,701 people through 1 water system.
Water systems serving Lomira
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LOMIRA WATERWORKS | WI1140151 | 2,701 | GW |
How Lomira compares
Full Wisconsin rankings →Lomira's score of 82.8/100 is above the average of 65/100 among major Wisconsin cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Wisconsin rankings →About Lomira, WI
Wikipedia →Lomira is a village in Dodge County, Wisconsin, United States. The population was 2,678 at the 2020 census. The village is located within the Town of Lomira, at the crossroads of State Highways 49, 67 and 175, U.S. Route 41 and Interstate 41.
Learn more about your water
Guides and resources related to Lomira's water quality findings.
Explore water quality across Dodge
Frequently asked questions
Is Lomira, WI tap water safe to drink?
Lomira's water quality earned a grade of B+ (82.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #211 out of 446 cities tested in Wisconsin.
What contaminants are in Lomira's water?
Lead was measured at 8.2 ppb (90th percentile). 48 violations are on record.
How is Lomira'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 Lomira?
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 Lomira's water come from?
Lomira's water is sourced from Groundwater. The city has 1 water system serving approximately 2,701 residents.
What health violations has Lomira's water system had?
Lomira has 7 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 6 violations remain unresolved.
Is Lomira's groundwater at risk of contamination?
Lomira 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 48 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 Lomira's water compare to other cities?
Lomira ranks #211 out of 446 cities in Wisconsin (better than 53% of state cities) and #6758 out of 15744 cities nationally (57th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lomira's small water system affect quality?
Lomira's system serves approximately 2,701 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 48 violations on record.