Is Hamersville, 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 ↓
80.7/100
waterverge.com Hamersville, OH — Water Quality Report
Hamersville's drinking water received a grade of B+ (80.7 out of 100), indicating good water quality. The city's 1 water system serves approximately 925 residents using purchased ground water.
Lead levels were measured at 0.0 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 2 violations on record, including 0 health-based violations. 2 remain unresolved.
What to know about Hamersville's water
Hamersville ranks #254 out of 511 cities in Ohio for water quality, placing it mid-range in the state.
Hamersville 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, Hamersville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Hamersville, OH water safe to drink?
Hamersville's tap water meets most EPA standards but has areas that warrant attention. With a grade of B+ (80.7/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 925 residents using groundwater (wells).
Recent water quality updates for Hamersville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Hamersville's water quality assessment. Grade: B+ (80.7/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-4424). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4360). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Hamersville'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
Hamersville's water system has 2 total violations on record, including 0 health-based violations. 2 remain unresolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Brown County has experienced 6 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 White Oak Creek Above Georgetown, East Fork Little Miami River At Williamsburg.
Where does Hamersville's water come from?
Hamersville's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 925 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include White Oak Creek Above Georgetown (river), East Fork Little Miami River At Williamsburg (river).
What Hamersville residents can do
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.
Hamersville'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 Hamersville
Industrial polluters nearby
Reported releases to surface water by facilities near Hamersville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
MILACRON PLASTICS TECHNOLOGIES GROUP LLC-MT ORAB MOUNT ORAB, OH45154 | — | — | 8.2 mi |
AMERICAN TRAILER WORKS OHIO LLC MOUNT ORAB, OH45154 | — | — | 8.5 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtBrown County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Brown County has experienced 6 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 Hamersville'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. | 19.40 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 19.400 mg/L (2005)
EPA action level: 1.3 mg/L
See how Hamersville compares by contaminant
Explore where Hamersville ranks among all Ohio cities for specific contaminants.
Water source & infrastructure
Where Hamersville's water comes from
Hamersville 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 Hamersville'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 925 people through 1 water system.
Water bodies near Hamersville
Hamersville is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Hamersville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| HAMERSVILLE VILLAGE PWS | OH0800603 | 925 | GWP |
How Hamersville compares
Full Ohio rankings →Hamersville's score of 80.7/100 is above the average of 58/100 among major Ohio cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Ohio rankings →About Hamersville, OH
Learn more about your water
Guides and resources related to Hamersville's water quality findings.
Explore water quality across Brown
Frequently asked questions
Is Hamersville, OH tap water safe to drink?
Hamersville's water quality earned a grade of B+ (80.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #254 out of 511 cities tested in Ohio.
What contaminants are in Hamersville's water?
Lead was measured at 0.0 ppb (90th percentile). 2 violations are on record.
How is Hamersville'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 Hamersville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Hamersville's water come from?
Hamersville's water is sourced from Purchased ground water. The city has 1 water system serving approximately 925 residents.
Is Hamersville's groundwater at risk of contamination?
Hamersville 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 2 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 Hamersville's water compare to other cities?
Hamersville ranks #254 out of 511 cities in Ohio (better than 50% of state cities) and #7764 out of 15744 cities nationally (51th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Hamersville's small water system affect quality?
Hamersville's system serves approximately 925 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 2 violations on record.