Wisconsin
Water Quality Report
Score Distribution
Lowest Scoring Water Systems
Counties in Wisconsin
Cities in Wisconsin
View all 269 cities →Popular City Comparisons in Wisconsin
Quickly compare major cities in Wisconsin by water quality score and grade.
Recommended Water Filters for Wisconsin Residents
Independent testing guidance: if your local water provider reports chlorine byproducts, aging lead service lines, or emerging PFAS, these NSF-certified filtration systems provide verified household protection.
APEC Water Systems ROES-50 5-Stage Reverse Osmosis System
Removes up to 99% of 1,000+ contaminants including Lead, Chlorine, PFAS, Fluoride, Arsenic, and TDS.
Waterdrop G3P800 Tankless Reverse Osmosis System
800 GPD high capacity, 3:1 pure-to-drain ratio, smart LED faucet displaying real-time TDS and filter life.
Aquasana 3-Stage Under Sink Water Filter System (AQ-5300+)
Reduces 77 contaminants including 99.6% of Lead and PFOA/PFOS while retaining healthy minerals (calcium, magnesium).
Frizzlife Under Sink Water Filter System (MK99)
Directly hooks into cold water line with 0.5-micron precision. Quick-change twist-in filter cartridges.
ZeroWater 5-Stage 22-Cup Ready-Read Filter Dispenser
5-stage ion exchange removes 99.6% of total dissolved solids. Built-in digital TDS meter included.
Clearly Filtered Water Pitcher with Affinity Filtration
Independently tested against 365+ contaminants including PFAS, microplastics, lead, fluoride, and glyphosate.
Brita Elite Water Filter Pitcher (Monterey)
Reduces 99% of Lead and 30+ contaminants. Each Elite filter lasts 6 months (120 gallons) — 3x longer than standard.
AquaBliss High Output Revitalizing Shower Filter
Quickly neutralizes chlorine, heavy metals, pesticides, and scale, preventing dry itchy skin and damaged hair.
Frequently Asked Questions
Is tap water in Wisconsin safe to drink?
Wisconsin has an average WaterQ score of 85/100 across 313 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Wisconsin?
WaterQ currently tracks 313 public water systems in Wisconsin.
Where can I compare cities in Wisconsin?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.