Is Delaware Twp.-1007, NJ 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 ↓
79.7/100
waterverge.com Delaware Twp.-1007, NJ — Water Quality Report
Delaware Twp.-1007's drinking water received a grade of B (79.7 out of 100), indicating good water quality. The city's 2 water systems serve approximately 756 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 62 violations on record, including 16 health-based violations. 11 remain unresolved.
What to know about Delaware Twp.-1007's water
Delaware Twp.-1007 ranks #133 out of 435 cities in New Jersey for water quality, placing it mid-range in the state.
Delaware Twp.-1007 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 Twp.-1007 may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Delaware Twp.-1007, NJ water safe to drink?
Delaware Twp.-1007's drinking water has significant quality concerns based on EPA testing data. With a grade of B (79.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 756 residents using groundwater (wells).
Recent water quality updates for Delaware Twp.-1007
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Delaware Twp.-1007's water quality assessment. Grade: B (79.7/100).
Contaminants: Lead and Copper Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-4614). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3573). Hurricane event — may have impacted local water infrastructure.
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Delaware Twp.-1007'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 Twp.-1007's water system has 62 total violations on record, including 16 health-based violations. 11 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Hunterdon County has experienced 10 federally declared disasters since 1971. 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 South Branch Raritan River At Stanton, Neshanic River At Reaville, Delaware River At Frenchtown, Del And Rar Ca Feeder At Washington Crossing, Delaware River At Stockton.
Where does Delaware Twp.-1007's water come from?
Delaware Twp.-1007's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 756 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include South Branch Raritan River At Stanton (river), Neshanic River At Reaville (river), Delaware River At Frenchtown (river), Del And Rar Ca Feeder At Washington Crossing (stream), Delaware River At Stockton (river).
What Delaware Twp.-1007 residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Delaware Twp.-1007'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 Twp.-1007'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
Drought conditions
D1 — moderate droughtHunterdon 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
Hunterdon County has experienced 10 federally declared disasters since 1971. 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 Twp.-1007'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. | 2.50 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 2.500 mg/L (1993)
EPA action level: 1.3 mg/L
See how Delaware Twp.-1007 compares by contaminant
Explore where Delaware Twp.-1007 ranks among all New Jersey cities for specific contaminants.
Water source & infrastructure
Where Delaware Twp.-1007's water comes from
Delaware Twp.-1007'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 756 people through 2 water systems.
Water bodies near Delaware Twp.-1007
Delaware Twp.-1007 is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Delaware Twp.-1007
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DELAWARE TOWNSHIP MUA | NJ1007001 | 500 | GW |
| ROSEMONT WATER COMPANY | NJ1007002 | 256 | GW |
How Delaware Twp.-1007 compares
Full New Jersey rankings →Delaware Twp.-1007's score of 79.7/100 is above the average of 63/100 among major New Jersey cities. It outscores 10 of 10 nearby cities.
Nearby cities
View New Jersey rankings →About Delaware Twp.-1007, NJ
Wikipedia →Sergeantsville is a historic unincorporated community located within Delaware Township, in Hunterdon County, in the U.S. state of New Jersey.
Learn more about your water
Guides and resources related to Delaware Twp.-1007's water quality findings.
Explore water quality across Hunterdon
Frequently asked questions
Is Delaware Twp.-1007, NJ tap water safe to drink?
Delaware Twp.-1007's water quality earned a grade of B (79.7/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #133 out of 435 cities tested in New Jersey.
What contaminants are in Delaware Twp.-1007's water?
Lead was measured at 0.0 ppb (90th percentile). 62 violations are on record.
How is Delaware Twp.-1007'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 Twp.-1007?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Delaware Twp.-1007's water come from?
Delaware Twp.-1007's water is sourced from Groundwater. The city has 2 water systems serving approximately 756 residents.
What health violations has Delaware Twp.-1007's water system had?
Delaware Twp.-1007 has 16 health-based violations on record. The most recent violation was recorded in December 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 11 violations remain unresolved.
Is Delaware Twp.-1007's groundwater at risk of contamination?
Delaware Twp.-1007 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 62 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 Twp.-1007's water compare to other cities?
Delaware Twp.-1007 ranks #133 out of 435 cities in New Jersey (better than 69% of state cities) and #8173 out of 15744 cities nationally (48th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.