Is Delaware (T), PA 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 ↓
81.7/100
waterverge.com Delaware (T), PA — Water Quality Report
Delaware (T)'s drinking water received a grade of B+ (81.7 out of 100), indicating good water quality. The city's 2 water systems serve approximately 2,000 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 56 violations on record, including 1 health-based violation. 13 remain unresolved.
What to know about Delaware (T)'s water
Delaware (T) ranks #70 out of 560 cities in Pennsylvania for water quality, placing it above average in the state.
Delaware (T) 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, Delaware (T) may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Delaware (T), PA water safe to drink?
Delaware (T)'s drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (81.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 2,000 residents using groundwater (wells).
Recent water quality updates for Delaware (T)
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Delaware (T)'s water quality assessment. Grade: B+ (81.7/100).
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4615). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3572). Hurricane event — may have impacted local water infrastructure.
Contaminants: Lead and Copper Rule.
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Delaware (T)'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
Delaware (T)'s water system has 56 total violations on record, including 1 health-based violation. 13 remain unresolved. 2 violations were issued in the last 5 years.
Flood & environmental risk
Sullivan County has experienced 10 federally declared disasters since 1984. 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 Callicoon Creek, Delaware River.
Where does Delaware (T)'s water come from?
Delaware (T)'s drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 2,000 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Callicoon Creek (river), Delaware River (river).
What Delaware (T) residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Delaware (T)'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.
Delaware (T)'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
Flood & disaster history
Sullivan County has experienced 10 federally declared disasters since 1984. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Delaware (T)'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. | 1.90 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Delaware (T) compares by contaminant
Explore where Delaware (T) ranks among all Pennsylvania cities for specific contaminants.
Water source & infrastructure
Where Delaware (T)'s water comes from
Delaware (T)'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 private ownership and serves approximately 2,000 people through 2 water systems.
Water bodies near Delaware (T)
Delaware (T) is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Delaware (T)
| System Name | PWSID | Population | Source |
|---|---|---|---|
| VILLA ROMA COUNTRY CLUB | NY5207183 | 1,150 | GW |
| CALLICOON WD | NY5203321 | 850 | GW |
How Delaware (T) compares
Full Pennsylvania rankings →Delaware (T)'s score of 81.7/100 is above the average of 49/100 among major Pennsylvania cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Pennsylvania rankings →About Delaware (T), PA
Wikipedia →Hortonville is a census-designated place in the town of Delaware, Sullivan County, New York, United States. As of the 2010 census, its population was 218. Its ZIP code is 12745.
Learn more about your water
Guides and resources related to Delaware (T)'s water quality findings.
Explore water quality across Sullivan
Frequently asked questions
Is Delaware (T), PA tap water safe to drink?
Delaware (T)'s water quality earned a grade of B+ (81.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #70 out of 560 cities tested in Pennsylvania.
What contaminants are in Delaware (T)'s water?
Lead was measured at 0.0 ppb (90th percentile). 56 violations are on record.
How is Delaware (T)'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 Delaware (T)?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Delaware (T)'s water come from?
Delaware (T)'s water is sourced from Groundwater. The city has 2 water systems serving approximately 2,000 residents.
What health violations has Delaware (T)'s water system had?
Delaware (T) has 1 health-based violation on record. The most recent violation was recorded in August 2022. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 13 violations remain unresolved.
Is Delaware (T)'s groundwater at risk of contamination?
Delaware (T) 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 56 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 Delaware (T)'s water compare to other cities?
Delaware (T) ranks #70 out of 560 cities in Pennsylvania (better than 88% of state cities) and #7352 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.