Is Dover, NH Tap Water Safe to Drink?
Yes, Dover tap water is safe to drink. Hardness is low at 30 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Dover Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Dover Compares
Dover's water is 78% softer than the national average of 138 PPM - ranking in the bottom 82% for hardness nationwide. Most homes here do not need a softener. Within New Hampshire, Dover has the 2nd hardest water out of 6 cities - 25% above the state average of 24 PPM. Among smaller cities, Dover ranks #212 of 288 for hardness.
What Dover's Water Means for Your Home
Hardness: 30 PPM - Low Concern
Dover's water is slightly hard at 30 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Dover is softer than 82% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Beyond hardness, Dover's water is within EPA guidelines for regulated contaminants. Chlorine sits at 1.2 mg/L — normal for municipal systems, but enough to notice. 3 contaminants exceed EWG's stricter health guidelines, though all are within legal limits. If your water tastes like a pool or your skin feels dry after showers, a whole-house carbon filter is the simplest fix. A shower filter is a quick, affordable starting point that most people notice immediately. Want the full picture? Request your utility's annual Consumer Confidence Report for neighborhood-level data.
What's in the Treatment Process
Even though Dover draws from groundwater, the treatment process still generates disinfection byproducts: HAA5 at 3.45 ppb. Groundwater typically needs less treatment than surface water, but when organic compounds are present in the aquifer, chlorination creates the same byproducts. All levels are within legal limits, though above the stricter EWG health guidelines.
Chromium-6 is naturally present in Dover's aquifer geology at 0.12 ppb — 6x the EWG health guideline. There's no federal legal limit for chromium-6 specifically (only total chromium), which is why EWG tracks it separately. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 30 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 40 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 0 ppt | — | No total limit | ✓ ND |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.2 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | Not reported | 5 mg/L | 10 mg/L | N/A |
Good news for Dover residents. Your water quality is generally good. Most homes in this area do not need a water softener. If you have concerns about lead (especially in buildings constructed before 1986) or chlorine taste, a point-of-use filter is the most practical and cost-effective solution.
Quick Fix for Chlorine: Shower Filter
At 1.2 mg/L chlorine, many Dover residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in Dover
City-wide data is a solid starting point, but your specific tap might differ based on plumbing age, distance from the treatment plant, or seasonal changes.
Free option: Request City of Dover Water's annual Consumer Confidence Report for official city-level data.
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About Dover's Water Supply
Water Utility: City of Dover Water
Water Source: Bellamy Reservoir (Groundwater)
Population Served: 29,000
Hardness: 30 PPM (1.8 grains per gallon)
Dover draws its drinking water from groundwater sources — Bellamy Reservoir. Groundwater typically requires less treatment than surface water because the earth acts as a natural filter. The tradeoff: dissolved minerals from underground rock formations, which is why mineral content varies by aquifer depth and geology. The geological profile determines hardness, iron, and trace mineral levels. The system serves 29,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Dover Water's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by City of Dover Water in Dover, NH, including ZIP codes:
03042, 03261, 03290, 03291, 03801, 03802, 03803, 03804, 03815, 03820, 03821, 03822, 03823, 03824, 03825, 03833, 03835, 03839, 03840, 03842, 03843, 03844, 03851, 03852, 03854, 03855, 03856, 03857, 03861, 03862, 03866, 03867, 03868, 03869, 03870, 03871, 03872, 03878, 03884, 03885, 03887, 03901, 03902, 03903, 03904, 03905, 03906, 03907, 03908, 03909, 03910, 03911, 04027, 04054
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Dover to Other New Hampshire Cities
Frequently Asked Questions About Dover Water
Is Dover tap water safe to drink?
Where does Dover's water come from?
Do I need a water softener in Dover?
What are disinfection byproducts in Dover's water?
Is chromium-6 in Dover's water?
Why does Dover water taste like chlorine?
Can I drink Dover tap water straight from the faucet?
What water filter is best for Dover?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What Dover Homeowners Actually Buy
Common purchases for homes with 30 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Dover's water data.