Is Carlisle, OH Tap Water Safe to Drink?
Graded A- — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
88.9/100
waterverge.com Carlisle, OH — Water Quality Report
Carlisle's drinking water received a grade of A- (88.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,475 residents using purchased ground water.
Lead levels were measured at 1.8 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 29 violations on record, including 0 health-based violations. 4 remain unresolved.
What to know about Carlisle's water
Carlisle ranks #54 out of 511 cities in Ohio for water quality, placing it above average in the state.
Carlisle 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, Carlisle may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Carlisle, OH water safe to drink?
Carlisle's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (88.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,475 residents using groundwater (wells).
Recent water quality updates for Carlisle
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Carlisle's water quality assessment. Grade: A- (88.9/100).
Contaminants: Consumer Confidence Rule.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3250). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-831). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Carlisle'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
Carlisle's water system has 29 total violations on record, including 0 health-based violations. 4 remain unresolved.
Flood & environmental risk
Warren 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 G Miami River At Sellars Rd At West Carrollton, Holes Creek Near Kettering, Great Miami River At Miamisburg, Great Miami River At Franklin, Twin Creek Near Germantown.
Where does Carlisle's water come from?
Carlisle's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,475 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include G Miami River At Sellars Rd At West Carrollton (river), Holes Creek Near Kettering (river), Great Miami River At Miamisburg (river), Great Miami River At Franklin (river), Twin Creek Near Germantown (river).
What Carlisle residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Carlisle'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.
Carlisle'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 Carlisle
Industrial polluters nearby
Reported releases to surface water by facilities near Carlisle, ranked by pounds discharged annually.
Total reported releases to surface water: 98,796 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 | 6.6 mi |
ESSITY OPERATIONS WAUSAU LLC MIDDLETOWN, OH45042 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 4,372 | 6.0 mi |
SUNSTAR ENGINEERING AMERICAS INC. AUTOMOTIVE DIV SPRINGBORO, OH45066 | Zinc compounds | 5 | 3.7 mi |
SUN CHEMICAL CORP FRANKLIN, OH45005 | — | — | 3.2 mi |
SONOCO FLEXIBLE PACKAGING FRANKLIN, OH45005 | — | — | 2.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Carlisle
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.
- MOUND PLANT USDOE3.8 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Warren 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 Carlisle'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. | 1.8 | 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. | 618.00 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 618.000 mg/L (2004)
EPA action level: 1.3 mg/L
See how Carlisle compares by contaminant
Explore where Carlisle ranks among all Ohio cities for specific contaminants.
Water source & infrastructure
Where Carlisle's water comes from
Carlisle 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 Carlisle'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 1,475 people through 1 water system.
Water bodies near Carlisle
Carlisle is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Carlisle
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CARLISLE CITY PWS | OH8303803 | 1,475 | GWP |
How Carlisle compares
Full Ohio rankings →Carlisle's score of 88.9/100 is above the average of 58/100 among major Ohio cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Ohio rankings →About Carlisle, OH
Learn more about your water
Guides and resources related to Carlisle's water quality findings.
Explore water quality across Warren
Frequently asked questions
Is Carlisle, OH tap water safe to drink?
Carlisle's water quality earned a grade of A- (88.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #54 out of 511 cities tested in Ohio.
What contaminants are in Carlisle's water?
Lead was measured at 1.8 ppb (90th percentile). 29 violations are on record.
How is Carlisle'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 Carlisle?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Carlisle's water come from?
Carlisle's water is sourced from Purchased ground water. The city has 1 water system serving approximately 1,475 residents.
Is Carlisle's groundwater at risk of contamination?
Carlisle 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 29 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 Carlisle's water compare to other cities?
Carlisle ranks #54 out of 511 cities in Ohio (better than 89% of state cities) and #3174 out of 15744 cities nationally (80th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Carlisle's small water system affect quality?
Carlisle's system serves approximately 1,475 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 29 violations on record.