Is Mansfield, OH 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 ↓
43.5/100
waterverge.com Mansfield, OH — Water Quality Report
Mansfield's drinking water received a grade of F (43.5 out of 100), indicating failing water quality. The city's 19 water systems serve approximately 56,347 residents using surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. PFAS testing under UCMR 5 found no detectable forever chemicals.
The system has 803 violations on record, including 37 health-based violations. 83 remain unresolved.
What to know about Mansfield's water
Mansfield ranks #494 out of 511 cities in Ohio for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
Haloacetic acid (HAA5) levels were elevated at 34.3 µg/L in UCMR 4 testing, though below the 60 µg/L EPA limit. Activated carbon filtration can help reduce these disinfection byproducts.
Hexavalent chromium (chromium-6) was detected at 0.04 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
The system has seen 16 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Mansfield, OH water safe to drink?
Mansfield's drinking water has significant quality concerns based on EPA testing data. With a grade of F (43.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 19 water systems serve approximately 56,347 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Mansfield
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Mansfield's water quality assessment. Grade: F (43.5/100).
1 health-based. Contaminants: Long Term 2 Enhanced Surface Water Treatment Rule.
Contaminants: LEAD AND COPPER RULE REVISIONS.
1 health-based. Contaminants: Long Term 2 Enhanced Surface Water Treatment Rule.
Federal disaster declaration (FEMA DR-3250). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-796). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Mansfield'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
Mansfield's water system has 803 total violations on record, including 37 health-based violations. 83 remain unresolved. 16 violations were issued in the last 5 years.
Flood & environmental risk
Richland County has experienced 2 federally declared disasters since 1987. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Black Fork Mohican River At Shelby, Touby Run At W 6Th St At Mansfield, Rocky Fork At Lucas, Clear Fork Reservoir Near Lexington, Cedar Fork Above Bellville.
Where does Mansfield's water come from?
Mansfield's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 19 water systems serving approximately 56,347 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Black Fork Mohican River At Shelby (river), Touby Run At W 6Th St At Mansfield (river), Rocky Fork At Lucas (river), Clear Fork Reservoir Near Lexington (lake), Cedar Fork Above Bellville (river).
What Mansfield residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Mansfield'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 ↓Forever chemicals overview
National PFAS report →Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Mansfield
Industrial polluters nearby
Reported releases to surface water by facilities near Mansfield, ranked by pounds discharged annually.
Total reported releases to surface water: 242 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CLEVELAND-CLIFFS STEEL CORP - MANSFIELD WORKS MANSFIELD, OH44903 | Zinc compounds | 231 | 1.3 mi |
BUNTING BEARINGS LLC MANSFIELD, OH44902 | Copper | 6 | 1.1 mi |
THERM-O-DISC INC MANSFIELD, OH44907 | Copper | 5 | 3.2 mi |
PITTSBURGH GLASS WORKS LLC CRESTLINE, OH44827 | — | — | 8.9 mi |
CSM HORVATH LEDGEBROOK MANSFIELD, OH44902 | — | — | 1.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Richland County has experienced 2 federally declared disasters since 1987. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Mansfield'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. | 0.0 | 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. | 64.00 | 1.3 | mg/L | Inorganic | Over Limit |
| 11Cl-PF3OUdS | ND | HI | µg/L | PFAS | Not Detected |
| 4:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 6:2 FTS 6:2 FTSPFAS A fluorotelomer sulfonate commonly found at sites contaminated with aqueous film-forming foam (AFFF) used in firefighting. Health EffectsPotential liver toxicity and endocrine disruption. Less studied but identified as a contaminant of concern. EPA LimitNo individual MCL (not yet regulated) Common SourcesFirefighting foam (AFFF), airports, military bases, and industrial facilities. | ND | HI | µg/L | PFAS | Not Detected |
| 8:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 9Cl-PF3ONS | ND | HI | µg/L | PFAS | Not Detected |
| ADONA | ND | HI | µg/L | PFAS | Not Detected |
| HFPO-DA HFPO-DA (GenX)PFAS A replacement for PFOA in manufacturing, marketed as safer but still a persistent "forever chemical." Also known as GenX. Health EffectsLiver and kidney effects, reproductive toxicity, immune system effects, and potential cancer risk. EPA Limit10 ppt MCL Common SourcesFluoropolymer manufacturing (used as PFOA replacement), industrial wastewater discharge. | ND | 0.01 | µg/L | PFAS | Not Detected |
| lithium LithiumInorganic A naturally occurring alkali metal found in groundwater. Monitored under UCMR 5 to assess occurrence in drinking water. Health EffectsKidney effects at high doses. Low-level exposure effects under study; some research suggests neurological effects. EPA LimitNo MCL (monitoring only under UCMR 5) Common SourcesNatural mineral deposits, geothermal water, and industrial discharge. | ND | HI | µg/L | PFAS | Not Detected |
| NEtFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| NFDHA | ND | HI | µg/L | PFAS | Not Detected |
| NMeFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| PFBA PFBAPFAS One of the shortest-chain PFAS compounds. Very mobile in water and difficult to remove with standard filtration. Health EffectsThyroid effects, potential developmental toxicity. Shorter half-life in body than long-chain PFAS. EPA LimitNo individual MCL (not yet regulated) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and firefighting foam. | ND | HI | µg/L | PFAS | Not Detected |
| PFBS PFBSPFAS A short-chain PFAS used as a replacement for PFOS. While it clears the body faster than long-chain PFAS, it still persists in the environment. Health EffectsThyroid effects, reproductive and developmental toxicity, kidney effects. EPA LimitPart of Hazard Index (1.0) Common SourcesIndustrial discharge, firefighting foam, and as a replacement chemical in manufacturing. | ND | HI | µg/L | PFAS | Not Detected |
| PFDA | ND | HI | µg/L | PFAS | Not Detected |
| PFDoA | ND | HI | µg/L | PFAS | Not Detected |
| PFEESA | ND | HI | µg/L | PFAS | Not Detected |
| PFHpA PFHpAPFAS A medium-chain PFAS compound found in various environmental samples. Less studied than PFOA/PFOS but still considered a contaminant of concern. Health EffectsLiver effects, potential developmental toxicity, and endocrine disruption. EPA LimitPart of Hazard Index (1.0) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and contaminated water sources. | ND | HI | µg/L | PFAS | Not Detected |
| PFHpS | ND | HI | µg/L | PFAS | Not Detected |
| PFHxA PFHxAPFAS A short-chain PFAS replacement chemical widely used after manufacturers phased out longer-chain PFAS. Very commonly detected in water. Health EffectsLiver and kidney effects, potential thyroid disruption. Considered less toxic than long-chain PFAS but still persistent. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial processes, firefighting foam (AFFF), food packaging, and textile treatment. | ND | HI | µg/L | PFAS | Not Detected |
| PFHxS PFHxSPFAS A medium-chain PFAS found in firefighting foam and consumer products. It has a long half-life in the human body, similar to long-chain PFAS. Health EffectsImmune system effects, thyroid disruption, and potential reproductive and developmental harm. EPA LimitPart of Hazard Index (1.0) Common SourcesFirefighting foam (AFFF), waterproof textiles, food packaging, and industrial discharge. | ND | HI | µg/L | PFAS | Not Detected |
| PFMBA | ND | HI | µg/L | PFAS | Not Detected |
| PFMPA | ND | HI | µg/L | PFAS | Not Detected |
| PFNA PFNAPFAS A long-chain PFAS compound used in manufacturing fluoropolymers. It bioaccumulates in the body and is very persistent in the environment. Health EffectsDevelopmental effects, liver toxicity, immune suppression, and potential cancer risk. EPA LimitPart of Hazard Index (1.0) Common SourcesFluoropolymer manufacturing, industrial emissions, and contaminated water sources. | ND | HI | µg/L | PFAS | Not Detected |
| PFOA PFOAPFAS A long-chain PFAS ("forever chemical") once widely used in nonstick coatings and firefighting foam. It persists in the body and environment for years. Health EffectsLinked to kidney and testicular cancer, thyroid disease, elevated cholesterol, and reproductive issues. EPA Limit4.0 ppt MCL Common SourcesIndustrial discharge, firefighting foam (AFFF), nonstick cookware manufacturing, and contaminated groundwater. | ND | 0.004 | µg/L | PFAS | Not Detected |
| PFOS PFOSPFAS A long-chain PFAS compound historically used in stain-resistant coatings and firefighting foam. One of the most studied and persistent PFAS chemicals. Health EffectsLiver damage, immune system suppression, thyroid disruption, increased cholesterol, and potential cancer risk. EPA Limit4.0 ppt MCL Common SourcesFirefighting foam (AFFF), industrial sites, stain-resistant fabric treatments, and contaminated groundwater. | ND | 0.004 | µg/L | PFAS | Not Detected |
| PFPeA PFPeAPFAS A short-chain PFAS compound commonly detected in drinking water. One of the most frequently found PFAS in UCMR 5 monitoring. Health EffectsLess studied than PFOA/PFOS. Potential liver and thyroid effects. Research is ongoing. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial discharge, firefighting foam degradation, and consumer products. | ND | HI | µg/L | PFAS | Not Detected |
| PFPeS | ND | HI | µg/L | PFAS | Not Detected |
| PFTA | ND | HI | µg/L | PFAS | Not Detected |
| PFTrDA | ND | HI | µg/L | PFAS | Not Detected |
| PFUnA | ND | HI | µg/L | PFAS | Not Detected |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Mansfield compares by contaminant
Explore where Mansfield ranks among all Ohio cities for specific contaminants.
Water source & infrastructure
Where Mansfield's water comes from
Mansfield's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 56,347 people through 19 water systems.
Water bodies near Mansfield
Mansfield is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Mansfield
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MANSFIELD CITY | OH7002914 | 51,000 | SW |
| MADISON WATER DISTRICT | OH7006712 | 2,050 | GW |
| WALNUT HILLS WATER ASSOCIATION | OH7005032 | 583 | GW |
| EXPRESSVIEW COMM WATER ASSOCIATION | OH7001012 | 300 | GW |
| SHELLY ACRES WATER ASSOCIATION | OH7004612 | 254 | GW |
| LAKEVIEW ESTATES MHP | OH5900512 | 229 | GW |
| LEXVIEW ALLOTMENT | OH7002312 | 225 | GW |
| WILLOW PARK WATER ASSOCIATION | OH7005112 | 200 | GW |
| MIFFLIN CARE CENTER | OH7006412 | 200 | GW |
| COLONIAL HILLS MHP | OH7000312 | 185 | GW |
| HEATHERWOOD COMMUNITY WATER ASSOCIATION | OH7001712 | 177 | GW |
| HILLSDALE COMMUNITY WATER ASSOCIATION PW | OH7001912 | 160 | GW |
| SOUTHERN ESTATES WATER ASSOC PWS | OH7004812 | 150 | GW |
| PEYTON COMMUNITY WELL | OH7003712 | 149 | GW |
| MEADOWOOD WATER ASSOCIATION | OH7003112 | 140 | GW |
| DAYSPRING ASSISTED LIVING AND CARE | OH7004112 | 95 | GW |
| HANLEY VILLAGE WATER ASSOCIATION | OH7005412 | 95 | GW |
| HANLEY ACRES WATER ASSOCIATION | OH7001512 | 85 | GW |
| NORTHWOODS MHC | OH5501912 | 70 | GW |
How Mansfield compares
Full Ohio rankings →Mansfield's score of 43.5/100 is below the average of 58/100 among major Ohio cities. It outscores 4 of 10 nearby cities. 6 of 10 nearby cities score higher.
Nearby cities
View Ohio rankings →About Mansfield, OH
Wikipedia →Mansfield is a city in Richland County, Ohio, United States, and its county seat. The population was 47,534 at the 2020 census. Located approximately halfway between Cleveland and Columbus via Interstate 71, it is part of the Northeast Ohio region in the western foothills of the Allegheny Plateau.
Learn more about your water
Guides and resources related to Mansfield's water quality findings.
Explore water quality across Richland
Frequently asked questions
Is Mansfield, OH tap water safe to drink?
Mansfield's water quality earned a grade of F (43.5/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #494 out of 511 cities tested in Ohio.
What contaminants are in Mansfield's water?
Lead was measured at 0.0 ppb (90th percentile). No PFAS compounds were detected. 803 violations are on record.
How is Mansfield'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 Mansfield?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Mansfield's water come from?
Mansfield's water is sourced from Surface water. The city has 19 water systems serving approximately 56,347 residents.
What health violations has Mansfield's water system had?
Mansfield has 37 health-based violations on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 83 violations remain unresolved.
How does Mansfield's water compare to other cities?
Mansfield ranks #494 out of 511 cities in Ohio (better than 3% of state cities) and #14541 out of 15744 cities nationally (8th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.