Lake Mills Tap Water Quality Report
Lake Mills's water has 3 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
Water system
LAKE MILLS WATERWORKS
People Served
6,211
Health-based violations since 2020
1
LAKE MILLS WATERWORKS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Aug 2025 · LAKE MILLS WATERWORKS
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Lake Mills Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Lake Mills's water has 3 contaminants above EPA health-based guidelines (MCLGs).
LAKE MILLS WATERWORKS, Lake Mills's water system, serves 6,211 people. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for LAKE MILLS WATERWORKS is from Aug 2025.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Wisconsin
Lake Mills Water Service Areas
What these numbers actually mean for Lake Mills, WI
We read Lake Mills, WI’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 3 contaminants above EPA MCLGs, 2 contaminants with an EPA health goal detected in some samples (no level on file) and 1 health-based EPA violation that began after the latest compliance result on file
- 121 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Lake Mills's water
LAKE MILLS WATERWORKS
PWSID WI1280108
LAKE MILLS WATERWORKS reported 0.885 mg/L, at or above the 0.7 mg/L U.S. Public Health Service recommendation and below the 1.5 mg/L WHO guideline value and NTP neurodevelopment review level.
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Recommended Water Filters for Lake Mills
Based on Lake Mills's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
Solventum Purification Inc.
3MRO401
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
Solventum Purification Inc.
3MRO301
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Verify Your Water Quality with Independent Testing
With 3 contaminants above EPA MCLGs, 2 contaminants with an EPA health goal detected in some samples (no level on file) and 1 health-based EPA violation that began after the latest compliance result on file, independent laboratory testing provides a second opinion and can track changes over time.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
With 3 contaminants above health guidelines, you may want to explore water purification options. Learn how to make distilled water at home for applications like humidifiers, CPAP machines, and baby formula.
What Lake Mills's water readings can explain
Utility-reported data for Lake Mills includes iron and sulfate — the readings behind these common tap water questions. We publish a city-level hardness figure for Lake Mills, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Lake Mills? Public-water results do not apply to private wells. See Jefferson County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Lake Mills
Lake Mills's tap water measures 18.9 grains per gallon (324.0 mg/L) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 18.9 gpg water in Lake Mills — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Wisconsin as a whole, read water softener cost in Wisconsin — priced against the plumber wage published for the state.
Frequently Asked Questions About Lake Mills Tap Water
Lake Mills's water has 3 contaminants above EPA MCLGs. We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. EPA records a health-based violation for LAKE MILLS WATERWORKS that began after its latest compliance result on file (Aug 2022): OCCT/SOWT Treatment Installation/Demonstration (Lead and Copper Rule), which began on September 17, 2022. Every such result predates it; its later EPA UCMR 5 results (Aug 2025) screen for unregulated contaminants and cannot show the water met this standard, so this page does not call the water safe.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach LAKE MILLS WATERWORKS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact LAKE MILLS WATERWORKS directly.
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