01The verdict: is Lincoln water safe?
Lincoln's tap water meets most EPA standards but has areas that warrant attention. With a grade of B+ (81/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 3,300 residents using surface water (rivers, lakes, or reservoirs).
Copper is over its legal limit
Measured at 1.54 mg/L against the EPA Action Level of 1.3 mg/L. The ledger below shows how far over — and which filter removes it.
See the measurement ↓Top half in New Hampshire
Lincoln ranks #25 of 98 graded New Hampshire cities.
See the comparison ↓1 violation in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Lincoln's drinking water received a grade of B+ (81 out of 100), indicating good water quality. The city's 1 water system serves approximately 3,300 residents using surface water.
Lead levels were measured at 7.0 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 17 violations on record, including 14 health-based violations. 1 remains unresolved.
Lincoln ranks #25 out of 98 cities in New Hampshire for water quality, placing it above average in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection. As a small community water system, Lincoln may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Lincoln's water
Every contaminant flagged in Lincoln, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Over Limit — EPA Action Level: 1.3 mg/L
Exceeds the EPA action level. Copper leaches from household plumbing — flush taps for 30 seconds before drinking, and consider a certified filter.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. | 7.0 | 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. | 1.54 | 1.3 | mg/L | Inorganic | Over Limit |
Cities ranked by 90th-percentile lead PF PFAS in New Hampshire
Cities ranked by compounds detected Cu Copper in New Hampshire
Cities ranked by 90th-percentile copper
03Lincoln's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 17 violations on record, including 14 health-based violations. 1 remains unresolved.
6 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 148 ppb since 1993. Latest reading: 7 ppb (2024) — 47% of the action level. Sampled at higher-risk homes (90th percentile).
1.5mg/L(1993)
One sampling round on record — 118% of the 1.3mg/L EPA action level. Sampled at higher-risk homes (90th percentile).
04Where Lincoln's water comes from
Lincoln's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Local treatment
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system, operated under local government ownership.
3,300 people
Residents served across Lincoln's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 3,300 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| LINCOLN WATER WORKS | NH1351010 | 3,300 | Surface Water |
Water bodies near Lincoln
As a surface-water system, these water bodies may directly influence Lincoln's drinking water supply.
05Pressure on Lincoln's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
1 facility within 10 miles reported 0 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
Flood & storm history
10 federal disaster declarations on record for Grafton County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Lincoln compares
Scores for nearby New Hampshire cities on one line, with the average marked.
dashed line = New Hampshire average (66/100)
Lincoln scores 81/100 — above the New Hampshire average of 66/100. It outscores 6 of 10 nearby cities. Full New Hampshire rankings →
50.9 / 100ANashua, NH
88.7 / 100DConcord, NH
51.3 / 100BPortsmouth, NH
80.7 / 100AKeene, NH
89.2 / 100BDover, NH
84 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Lincoln's water — not generic advice.
Filter drinking & cooking water
Basic carbon filter for extra protection. Lead detected at 7.0 ppb
Compare tested filters →Flush taps & check your service line
Lead leaches from pipes as water sits. Run cold water 30 seconds before drinking (especially mornings), and ask the utility whether your address still has a lead service line.
Lead risks explained →Watch for Lincoln alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Lincoln, NH tap water safe to drink?
Lincoln's water quality earned a grade of B+ (81/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #25 out of 98 cities tested in New Hampshire.
What contaminants are in Lincoln's water?
Lead was measured at 7.0 ppb (90th percentile). 17 violations are on record.
How is Lincoln'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 Lincoln?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lincoln's water come from?
Lincoln's water is sourced from Surface water. The city has 1 water system serving approximately 3,300 residents.
What health violations has Lincoln's water system had?
Lincoln has 14 health-based violations on record. The most recent violation was recorded in January 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 1 violation remains unresolved.
How does Lincoln's water compare to other cities?
Lincoln ranks #25 out of 98 cities in New Hampshire (better than 74% of state cities) and #7534 out of 15382 cities nationally (51th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lincoln's small water system affect quality?
Lincoln's system serves approximately 3,300 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 17 violations on record.