Monticello Tap Water Quality Report
Monticello's water has 3 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
Water system
MONTICELLO WATERWORKS
People Served
1,217
Health-based violations since 2020
0
MONTICELLO WATERWORKS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Aug 2022 · MONTICELLO WATERWORKS
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Monticello 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. Monticello's water has 3 contaminants above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
MONTICELLO WATERWORKS, Monticello's water system, serves 1,217 people. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for MONTICELLO WATERWORKS is from Aug 2022.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Wisconsin
Monticello Water Service Areas
What these numbers actually mean for Monticello, WI
We read Monticello, 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 and 1 contaminant with an EPA health goal detected in some samples (no level on file)
- 81 results on file
- 16 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Monticello's water
MONTICELLO WATERWORKS
PWSID WI1230083
MONTICELLO WATERWORKS reported 0.782 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 Monticello
Based on Monticello'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 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
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 Monticello's water readings can explain
We publish a city-level hardness figure for Monticello, 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 Monticello? Public-water results do not apply to private wells. See Green County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Monticello
Monticello's tap water has an estimated 19.0 grains per gallon (325.0 mg/L, county sampling in Green 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 19.0 gpg water in Monticello — 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 Monticello Tap Water
Monticello's water has 3 contaminants above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach MONTICELLO WATERWORKS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact MONTICELLO WATERWORKS directly.
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