Is Ottoville, OH Tap Water Safe to Drink?
Graded A-, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
86.1/100
waterverge.com Ottoville, OH — Water Quality Report
Ottoville's drinking water received a grade of A- (86.1 out of 100), indicating good water quality. The city's 1 water system serves approximately 976 residents using groundwater.
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 6 violations on record, including 0 health-based violations. 5 remain unresolved.
What to know about Ottoville's water
Ottoville ranks #111 out of 511 cities in Ohio for water quality, placing it above average in the state.
Ottoville 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.
As a small community water system, Ottoville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Ottoville, OH water safe to drink?
Ottoville's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (86.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 976 residents using groundwater (wells).
Recent water quality updates for Ottoville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Ottoville's water quality assessment. Grade: A- (86.1/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3250). Hurricane event — may have impacted local water infrastructure.
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Ottoville's water supply.
Well within EPA limits.
Violation history
Ottoville's water system has 6 total violations on record, including 0 health-based violations. 5 remain unresolved.
Flood & environmental risk
Putnam County has experienced 1 federally declared disaster since 2005. 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 Auglaize River Near Fort Jennings, Ottawa River Near Kalida, Blanchard River Near Dupont.
Where does Ottoville's water come from?
Ottoville's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 976 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Auglaize River Near Fort Jennings (river), Ottawa River Near Kalida (river), Blanchard River Near Dupont (river).
What Ottoville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Ottoville'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 Ottoville
Industrial polluters nearby
Reported releases to surface water by facilities near Ottoville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
BUNGE N.A. (EAST) L.L.C. DELPHOS, OH45833 | — | — | 6.5 mi |
UNVERFERTH MANUFACTURING CO INC DELPHOS DIV DELPHOS, OH45833 | — | — | 6.5 mi |
AIRGAS SPECIALTY PRODUCTS - DELPHOS OH DELPHOS, OH45833 | — | — | 6.8 mi |
KALIDA MANUFACTURING INC KALIDA, OH45853 | — | — | 8.1 mi |
UNVERFERTH MANUFACTURING CO INC KALIDA, OH45853 | — | — | 7.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Putnam County has experienced 1 federally declared disaster since 2005. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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 |
Lead level trend (90th percentile)
See how Ottoville compares by contaminant
Explore where Ottoville ranks among all Ohio cities for specific contaminants.
Water source & infrastructure
Where Ottoville's water comes from
Ottoville'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 local government ownership and serves approximately 976 people through 1 water system.
Water bodies near Ottoville
Ottoville is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Ottoville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| OTTOVILLE VILLAGE | OH6900812 | 976 | GW |
How Ottoville compares
Full Ohio rankings →Ottoville's score of 86.1/100 is above the average of 58/100 among major Ohio cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Ohio rankings →About Ottoville, OH
Wikipedia →Ottoville is a village in Monterey Township, Putnam County, Ohio, United States. The population was 966 at the 2020 census.
Learn more about your water
Guides and resources related to Ottoville's water quality findings.
Explore water quality across Putnam
Frequently asked questions
Is Ottoville, OH tap water safe to drink?
Ottoville's water quality earned a grade of A- (86.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #111 out of 511 cities tested in Ohio.
What contaminants are in Ottoville's water?
Lead was measured at 0.0 ppb (90th percentile). 6 violations are on record.
How is Ottoville'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 Ottoville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Ottoville's water come from?
Ottoville's water is sourced from Groundwater. The city has 1 water system serving approximately 976 residents.
Is Ottoville's groundwater at risk of contamination?
Ottoville 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 6 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 Ottoville's water compare to other cities?
Ottoville ranks #111 out of 511 cities in Ohio (better than 78% of state cities) and #4941 out of 15744 cities nationally (69th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Ottoville's small water system affect quality?
Ottoville's system serves approximately 976 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 6 violations on record.