Is Danville, NH Tap Water Safe to Drink?
Graded F — but Lead was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
36.5/100
waterverge.com Danville, NH — Water Quality Report
Danville's drinking water received a grade of F (36.5 out of 100), indicating failing water quality. The city's 5 water systems serve approximately 1,291 residents using groundwater.
Lead levels were measured at 44.0 ppb (90th percentile), which exceeds the EPA action level of 15 ppb. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 249 violations on record, including 44 health-based violations. 24 remain unresolved.
What to know about Danville's water
Danville ranks #103 out of 119 cities in New Hampshire for water quality, placing it among the lowest-rated in the state.
Danville 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.
Lead levels exceed the EPA action level of 15 ppb, which typically indicates aging lead service lines or lead solder in the distribution system. An NSF 53-certified filter is strongly recommended for drinking and cooking water.
As a small community water system, Danville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 11 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Danville, NH water safe to drink?
Danville's drinking water has significant quality concerns based on EPA testing data. With a grade of F (36.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 5 water systems serve approximately 1,291 residents using groundwater (wells).
Recent water quality updates for Danville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Danville's water quality assessment. Grade: F (36.5/100).
Contaminants: Groundwater Rule.
Contaminants: Groundwater Rule.
1 health-based. Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4740). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4370). Coastal Storm event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Danville's water supply.
Exceeds EPA action level. Lead service line replacement and point-of-use filtration recommended.
Violation history
Danville's water system has 249 total violations on record, including 44 health-based violations. 24 remain unresolved. 11 violations were issued in the last 5 years.
Flood & environmental risk
Rockingham County has experienced 10 federally declared disasters since 1987. 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 Exeter River, Merrimack River, Spicket River.
Where does Danville's water come from?
Danville's drinking water comes from groundwater (wells), supplied by 5 water systems serving approximately 1,291 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Exeter River (river), Merrimack River (river), Spicket River (river).
What Danville residents can do
Recommended: NSF 53-certified pitcher or under-sink filter. This addresses the specific contaminants found in Danville'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.
Danville'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
D2 — severe droughtRockingham County is currently in D2 (severe 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
Rockingham County has experienced 10 federally declared disasters since 1987. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Danville'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. | 44.0 | 15 | ppb | Inorganic | Over Limit |
Lead level (90th percentile)
Latest reading: 44.0 ppb (2015)
EPA action level: 15 ppb
See how Danville compares by contaminant
Explore where Danville ranks among all New Hampshire cities for specific contaminants.
Water source & infrastructure
Where Danville's water comes from
Danville'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 1,291 people through 5 water systems.
Water bodies near Danville
Danville is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Danville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| COLBY POND | NH0582010 | 485 | GW |
| COTTON FARMS MHP | NH0583030 | 390 | GW |
| ROCK RIMMON COOPERATIVE | NH0583050 | 200 | GW |
| IRON WHEEL MHP | NH0583020 | 124 | GW |
| SPRUCE VALLEY MHP | NH0583010 | 92 | GW |
How Danville compares
Full New Hampshire rankings →Danville's score of 36.5/100 is below the average of 69/100 among major New Hampshire cities. 10 of 10 nearby cities score higher.
Nearby cities
View New Hampshire rankings →About Danville, NH
Wikipedia →Atkinson is a town in Rockingham County, New Hampshire, United States. The population was 7,087 at the 2020 census. It is located 34 miles north of Boston, and part of the Greater Boston region.
Learn more about your water
Guides and resources related to Danville's water quality findings.
Explore water quality across Rockingham
Frequently asked questions
Is Danville, NH tap water safe to drink?
Danville's water quality earned a grade of F (36.5/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #103 out of 119 cities tested in New Hampshire.
What contaminants are in Danville's water?
Lead was measured at 44.0 ppb (90th percentile). 249 violations are on record.
How is Danville'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 Danville?
Yes — lead levels exceed the EPA action level of 15 ppb. We recommend an NSF 53-certified filter or reverse osmosis system. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Danville's water come from?
Danville's water is sourced from Groundwater. The city has 5 water systems serving approximately 1,291 residents.
What health violations has Danville's water system had?
Danville has 44 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 24 violations remain unresolved.
Is Danville's groundwater at risk of contamination?
Danville 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 249 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 Danville's water compare to other cities?
Danville ranks #103 out of 119 cities in New Hampshire (better than 13% of state cities) and #15464 out of 15744 cities nationally (2th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.