Is Stoneboro, PA Tap Water Safe to Drink?
Graded B, with 12 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
78.7/100
waterverge.com Stoneboro, PA — Water Quality Report
Stoneboro's drinking water received a grade of B (78.7 out of 100), indicating good water quality. The city's 1 water system serves approximately 956 residents using groundwater.
Lead levels were measured at 4.5 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 98 violations on record, including 1 health-based violation. 12 remain unresolved.
What to know about Stoneboro's water
Stoneboro ranks #103 out of 560 cities in Pennsylvania for water quality, placing it above average in the state.
Stoneboro 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, Stoneboro may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 9 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Stoneboro, PA water safe to drink?
Stoneboro's drinking water has significant quality concerns based on EPA testing data. With a grade of B (78.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 956 residents using groundwater (wells).
Recent water quality updates for Stoneboro
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Stoneboro's water quality assessment. Grade: B (78.7/100).
Contaminants: Chlorine, Groundwater Rule.
Contaminants: Public Notice, Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3356). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3235). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Stoneboro's water supply.
Well within EPA limits.
Violation history
Stoneboro's water system has 98 total violations on record, including 1 health-based violation. 12 remain unresolved. 9 violations were issued in the last 5 years.
Flood & environmental risk
Mercer County has experienced 6 federally declared disasters since 1972. 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 French Creek At Utica.
Where does Stoneboro's water come from?
Stoneboro's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 956 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include French Creek At Utica (river).
What Stoneboro residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Stoneboro'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Stoneboro'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 Stoneboro
Industrial polluters nearby
Reported releases to surface water by facilities near Stoneboro, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
OLDCASTLE APG - FREDONIA FREDONIA, PA16124 | — | — | 7.3 mi |
COMPONENT INTERTECHNOLOGIES INC HADLEY, PA16130 | — | — | 6.5 mi |
RUSSELL STANDARD MERCER MERCER, PA16137 | — | — | 6.5 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Flood & disaster history
Mercer County has experienced 6 federally declared disasters since 1972. 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. | 4.5 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Stoneboro compares by contaminant
Explore where Stoneboro ranks among all Pennsylvania cities for specific contaminants.
Water source & infrastructure
Where Stoneboro's water comes from
Stoneboro'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 956 people through 1 water system.
Water bodies near Stoneboro
Stoneboro is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Stoneboro
| System Name | PWSID | Population | Source |
|---|---|---|---|
| STONEBORO WATER WORKS | PA6430056 | 956 | GW |
How Stoneboro compares
Full Pennsylvania rankings →Stoneboro's score of 78.7/100 is above the average of 49/100 among major Pennsylvania cities. It outscores 8 of 10 nearby cities.
Nearby cities
View Pennsylvania rankings →About Stoneboro, PA
Learn more about your water
Guides and resources related to Stoneboro's water quality findings.
Explore water quality across Mercer
Frequently asked questions
Is Stoneboro, PA tap water safe to drink?
Stoneboro's water quality earned a grade of B (78.7/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #103 out of 560 cities tested in Pennsylvania.
What contaminants are in Stoneboro's water?
Lead was measured at 4.5 ppb (90th percentile). 98 violations are on record.
How is Stoneboro'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 Stoneboro?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Stoneboro's water come from?
Stoneboro's water is sourced from Groundwater. The city has 1 water system serving approximately 956 residents.
What health violations has Stoneboro's water system had?
Stoneboro has 1 health-based violation on record. The most recent violation was recorded in November 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 12 violations remain unresolved.
Is Stoneboro's groundwater at risk of contamination?
Stoneboro 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 98 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 Stoneboro's water compare to other cities?
Stoneboro ranks #103 out of 560 cities in Pennsylvania (better than 82% of state cities) and #8576 out of 15744 cities nationally (46th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Stoneboro's small water system affect quality?
Stoneboro's system serves approximately 956 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 98 violations on record.