Merrill Tap Water Quality Report
Merrill's water has 1 contaminant above EPA MCLGs. Consider using a certified water filter for additional protection.
1 other system serving parts of Merrill reports results above guidelines — check which system bills you. LITTLE FLORIDA (2 above guidelines)
People Served
9,661
Health-based violations since 2020
1
MERRILL WATERWORKS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Oct 2023 · MERRILL WATERWORKS
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Merrill 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. Merrill's water has 1 contaminant above EPA health-based guidelines (MCLGs).
MERRILL WATERWORKS, Merrill's water system, serves 9,661 people. 1 other system also serves parts of Merrill. Each system's results are listed under its own name, never added to MERRILL WATERWORKS's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for MERRILL WATERWORKS is from Oct 2023.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Wisconsin
Merrill Water Service Areas
What these numbers actually mean for Merrill, WI
We read Merrill, 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.
- 1 contaminant above EPA MCLGs, 9 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
- 146 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Merrill's water
MERRILL WATERWORKS
PWSID WI7350123
MERRILL WATERWORKS reported 0.68 mg/L, below the 0.7 mg/L U.S. Public Health Service recommendation.
LITTLE FLORIDA
PWSID WI7350124
Fluoride was detected in 40.0% of LITTLE FLORIDA's samples (median below the detection limit).
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Recommended Water Filters for Merrill
Based on Merrill'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
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
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.
What Merrill's water readings can explain
Utility-reported data for Merrill includes iron and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Merrill, 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 Merrill? Public-water results do not apply to private wells. See Lincoln County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Merrill
Merrill's tap water measures 6.8 grains per gallon (116.0 mg/L) — moderately hard on the USGS scale, below the range where scale is usually worth treating.
Water softener cost for 6.8 gpg water in Merrill — 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 Merrill Tap Water
Merrill's water has 1 contaminant 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 MERRILL WATERWORKS that began after its latest compliance result on file (Aug 2022): Treatment Technique, Level 1 Assessment (RTCR) (Revised Total Coliform Rule), which began on October 17, 2025. Every such result predates it; its later EPA UCMR 5 results (Oct 2023) 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 MERRILL WATERWORKS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact MERRILL WATERWORKS directly.
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