Lake Geneva Tap Water Quality Report
Lake Geneva's water has 4 contaminants above EPA MCLGs and 1 above EPA's legal limit (MCL, enforceable from April 26, 2029). We recommend using a certified water filter.
2 other systems serving parts of Lake Geneva report results above guidelines — check which system bills you. INTERLAKEN RESORT AND VILLAGE (3 above guidelines), GENEVA NATIONAL COMMUNITY SERVICES (2 above guidelines)
Water system
LAKE GENEVA UTILITY COMMISSION
2 other systems also serve parts of Lake Geneva. See their figures
People Served
7,107
Health-based violations since 2020
0
LAKE GENEVA UTILITY COMMISSION. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Jun 2025 · LAKE GENEVA UTILITY COMMISSION
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Lake Geneva Tap Water Safe to Drink?
We strongly recommend using a certified water filter to reduce exposure: Lake Geneva's water has 5 contaminants above EPA health-based guidelines. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lake Geneva's water.
LAKE GENEVA UTILITY COMMISSION, Lake Geneva's water system, serves 7,107 people. 2 other systems also serve parts of Lake Geneva. Each system's results are listed under its own name, never added to LAKE GENEVA UTILITY COMMISSION's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for LAKE GENEVA UTILITY COMMISSION is from Jun 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 Geneva Water Service Areas
What these numbers actually mean for Lake Geneva, WI
We read Lake Geneva, 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.
- 4 contaminants above EPA MCLGs and 1 above EPA's legal limit (MCL, enforceable from April 26, 2029) and 1 contaminant with an EPA health goal detected in some samples (no level on file)
- 103 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Lake Geneva's water
LAKE GENEVA UTILITY COMMISSION
PWSID WI2650066
LAKE GENEVA UTILITY COMMISSION reported 0.736 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.
GENEVA NATIONAL COMMUNITY SERVICES
PWSID WI2650907
GENEVA NATIONAL COMMUNITY SERVICES reported 0.26 mg/L, below the 0.7 mg/L U.S. Public Health Service recommendation.
INTERLAKEN RESORT AND VILLAGE
PWSID WI2650143
No fluoride level in our data for INTERLAKEN RESORT AND VILLAGE. Your utility's annual water quality report (CCR) lists it.
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Recommended Water Filters for Lake Geneva
Based on Lake Geneva's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA's health goals (MCLGs) or legal limits (MCL).
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:
Filters for what Lake Geneva reported
Verify Your Water Quality with Independent Testing
With 4 contaminants above EPA MCLGs and 1 above EPA's legal limit (MCL, enforceable from April 26, 2029) and 1 contaminant with an EPA health goal detected in some samples (no level 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
PFAS Forever Chemicals Test
$339.95
Specialized test for PFOA, PFOS, and 24 other forever chemicals. Essential for areas near military bases, airports, or industrial sites.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
With 5 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 Geneva's water readings can explain
We publish a city-level hardness figure for Lake Geneva, 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 Geneva? Public-water results do not apply to private wells. See Walworth County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Lake Geneva
Lake Geneva's tap water has an estimated 14.6 grains per gallon (250.0 mg/L, county sampling in Walworth County) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 14.6 gpg water in Lake Geneva — 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 Geneva Tap Water
Lake Geneva's water has 4 contaminants above EPA MCLGs and 1 above EPA's legal limit (MCL, enforceable from April 26, 2029). We strongly recommend using a certified water filter to reduce exposure to these contaminants. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Lake Geneva's water.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach LAKE GENEVA UTILITY COMMISSION. For a problem with your water now (discolored water, no water, low pressure, a leak), contact LAKE GENEVA UTILITY COMMISSION directly.
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