Is Hayward, WI Tap Water Safe to Drink?
Graded F — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
43.4/100
waterverge.com Hayward, WI — Water Quality Report
Hayward's drinking water received a grade of F (43.4 out of 100), indicating failing water quality. The city's 7 water systems serve approximately 5,982 residents using groundwater.
Lead levels were measured at 2.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 397 violations on record, including 19 health-based violations. 55 remain unresolved.
What to know about Hayward's water
Hayward ranks #432 out of 446 cities in Wisconsin for water quality, placing it among the lowest-rated in the state.
Hayward relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
The system has seen 48 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Hayward, WI water safe to drink?
Hayward's drinking water has significant quality concerns based on EPA testing data. With a grade of F (43.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 7 water systems serve approximately 5,982 residents using groundwater (wells).
Recent water quality updates for Hayward
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Hayward's water quality assessment. Grade: F (43.4/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-3249). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1284). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Hayward's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Hayward's water system has 397 total violations on record, including 19 health-based violations. 55 remain unresolved. 48 violations were issued in the last 5 years.
Flood & environmental risk
Sawyer County has experienced 2 federally declared disasters since 1999. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Hayward's water come from?
Hayward's drinking water comes from groundwater (wells), supplied by 7 water systems serving approximately 5,982 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Hayward residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Hayward's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Hayward
Industrial polluters nearby
Reported releases to surface water by facilities near Hayward, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
LOUISIANA-PACIFIC HAYWARD SIDING HAYWARD, WI54843 | — | — | 2.7 mi |
ARCLIN SURFACES LLC HAYWARD, WI54843 | — | — | 0.2 mi |
HAYWARD READY-MIX CONCRETE LLC DIV OF TODD''S REDI HAYWARD, WI54843 | — | — | 2.0 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Sawyer County has experienced 2 federally declared disasters since 1999. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Hayward's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 2.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.37 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Hayward compares by contaminant
Explore where Hayward ranks among all Wisconsin cities for specific contaminants.
Water source & infrastructure
Where Hayward's water comes from
Hayward's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by native american ownership and serves approximately 5,982 people through 7 water systems.
Water systems serving Hayward
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DRY TOWN | 055295310 | 3,030 | GW |
| HAYWARD WATER UTILITY | WI8580532 | 2,552 | GW |
| NEW POST | 055295301 | 150 | GW |
| S AND J WILD RIVER MHP | WI8580535 | 90 | GW |
| TAMARACK HEALTH HAYWARD MEDICAL CENTER | WI8581004 | 85 | GW |
| LUEDTKES MOBILE HOME PARK | WI8580537 | 50 | GW |
| BIG MUSKY RESORT | WI8581273 | 25 | GW |
How Hayward compares
Full Wisconsin rankings →Hayward's score of 43.4/100 is below the average of 65/100 among major Wisconsin cities. It outscores 1 of 10 nearby cities. 9 of 10 nearby cities score higher.
Nearby cities
View Wisconsin rankings →ZIP codes served by Hayward
The water systems serving Hayward cover 1 ZIP code. Select any ZIP to see which water systems serve that area.
About Hayward, WI
Wikipedia →Hayward is a city in Sawyer County, Wisconsin, United States, and its county seat. Its population was 2,533 at the 2020 census. The city was formally organized in 1883. It is near the Namekagon River and is surrounded by the Town of Hayward.
Learn more about your water
Guides and resources related to Hayward's water quality findings.
Explore water quality across Sawyer
Frequently asked questions
Is Hayward, WI tap water safe to drink?
Hayward's water quality earned a grade of F (43.4/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #432 out of 446 cities tested in Wisconsin.
What contaminants are in Hayward's water?
Lead was measured at 2.0 ppb (90th percentile). 397 violations are on record.
How is Hayward's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Hayward?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Hayward's water come from?
Hayward's water is sourced from Groundwater. The city has 7 water systems serving approximately 5,982 residents.
What health violations has Hayward's water system had?
Hayward has 19 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 55 violations remain unresolved.
Is Hayward's groundwater at risk of contamination?
Hayward uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 397 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Hayward's water compare to other cities?
Hayward ranks #432 out of 446 cities in Wisconsin (better than 3% of state cities) and #14585 out of 15744 cities nationally (7th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.