Is Seven Mile, OH Tap Water Safe to Drink?
Graded B+ — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
81.4/100
waterverge.com Seven Mile, OH — Water Quality Report
Seven Mile's drinking water received a grade of B+ (81.4 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,000 residents using purchased ground water.
Lead levels were measured at 1.9 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 4 violations on record, including 0 health-based violations. 3 remain unresolved.
What to know about Seven Mile's water
Seven Mile ranks #235 out of 511 cities in Ohio for water quality, placing it mid-range in the state.
Seven Mile purchases its water from a regional wholesaler, meaning quality depends on both the supplier's treatment and the local distribution system's condition.
As a small community water system, Seven Mile may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Seven Mile, OH water safe to drink?
Seven Mile's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (81.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,000 residents using groundwater (wells).
Recent water quality updates for Seven Mile
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Seven Mile's water quality assessment. Grade: B+ (81.4/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Coliform (TCR).
Federal disaster declaration (FEMA DR-3250). Hurricane event — may have impacted local water infrastructure.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-1122). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Seven Mile'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
Seven Mile's water system has 4 total violations on record, including 0 health-based violations. 3 remain unresolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Butler County has experienced 4 federally declared disasters since 1968. 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 Great Miami River At Middletown, Sevenmile Creek At Camden, Great Miami River At Hamilton.
Where does Seven Mile's water come from?
Seven Mile's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,000 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Great Miami River At Middletown (river), Sevenmile Creek At Camden (river), Great Miami River At Hamilton (river).
What Seven Mile residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Seven Mile'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.
Seven Mile's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
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 Seven Mile
Industrial polluters nearby
Reported releases to surface water by facilities near Seven Mile, ranked by pounds discharged annually.
Total reported releases to surface water: 98,827 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CLEVELAND-CLIFFS INC. MIDDLETOWN, OH45044 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 94,419 | 8.6 mi |
ESSITY OPERATIONS WAUSAU LLC MIDDLETOWN, OH45042 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 4,372 | 8.2 mi |
MOLSON COORS USA LLC - TRENTON BREWERY TRENTON, OH45067 | Ammonia | 36 | 4.5 mi |
DUBOIS CHEMICALS INC. - HAMILTON OH (EAGLE) HAMILTON, OH45015 | — | — | 8.3 mi |
CMC REBAR-OH-CINCINNATI HAMILTON, OH45015 | — | — | 8.1 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Seven Mile
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- ARMCO INCORPORATION HAMILTON PLANT4.0 mi
- CHEM DYNE5.4 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Butler County has experienced 4 federally declared disasters since 1968. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Seven Mile'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. | 1.9 | 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. | 311.00 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 311.000 mg/L (2005)
EPA action level: 1.3 mg/L
See how Seven Mile compares by contaminant
Explore where Seven Mile ranks among all Ohio cities for specific contaminants.
Water source & infrastructure
Where Seven Mile's water comes from
Seven Mile purchases its water supply from a regional wholesale provider rather than treating raw water directly.
Water quality depends on both the wholesaler's treatment standards and the condition of Seven Mile's local distribution pipes and storage facilities.
Purchased water systems are common in suburban areas and smaller communities that lack the infrastructure for independent treatment.
The system is operated by local government ownership and serves approximately 1,000 people through 1 water system.
Water bodies near Seven Mile
Seven Mile is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Seven Mile
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SEVEN MILE VILLAGE PWS | OH0902612 | 1,000 | GWP |
How Seven Mile compares
Full Ohio rankings →Seven Mile's score of 81.4/100 is above the average of 58/100 among major Ohio cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Ohio rankings →About Seven Mile, OH
Wikipedia →Seven Mile is a village in Butler County, Ohio, United States. The population was 712 at the 2020 census.
Learn more about your water
Guides and resources related to Seven Mile's water quality findings.
Explore water quality across Butler
Frequently asked questions
Is Seven Mile, OH tap water safe to drink?
Seven Mile's water quality earned a grade of B+ (81.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #235 out of 511 cities tested in Ohio.
What contaminants are in Seven Mile's water?
Lead was measured at 1.9 ppb (90th percentile). 4 violations are on record.
How is Seven Mile'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 Seven Mile?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Seven Mile's water come from?
Seven Mile's water is sourced from Purchased ground water. The city has 1 water system serving approximately 1,000 residents.
Is Seven Mile's groundwater at risk of contamination?
Seven Mile 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 4 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 Seven Mile's water compare to other cities?
Seven Mile ranks #235 out of 511 cities in Ohio (better than 54% of state cities) and #7480 out of 15744 cities nationally (53th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Seven Mile's small water system affect quality?
Seven Mile's system serves approximately 1,000 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 4 violations on record.