Is Amherst, MA Tap Water Safe to Drink?
Yes, Amherst tap water is safe to drink. Hardness is low at 10 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Amherst Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Amherst Compares
Amherst's water is 93% softer than the national average of 138 PPM - ranking in the bottom 100% for hardness nationwide. Most homes here do not need a softener. Within Massachusetts, it ranks #20 of 21 cities (47% below the state average of 19 PPM). Among smaller cities, Amherst ranks #286 of 288 for hardness.
What Amherst's Water Means for Your Home
Hardness: 10 PPM - Low Concern
Amherst's water is soft at just 10 PPM. That's good news for your plumbing, appliances, and skin. Scale buildup is a non-issue here, and a water softener would be a waste of money. Amherst is softer than 100% of US cities. If you're thinking about water treatment in Amherst, contaminant filtration is the place to invest.
Contaminants & Safety
Lead levels deserve attention. At 5 ppb, Amherst is above the ideal of zero, though below the EPA action level of 15 ppb (dropping to 10 ppb in November 2027 under the Lead and Copper Rule Improvements). The lead typically comes from aging service lines or interior plumbing, not the treatment plant. A point-of-use filter certified for lead at the kitchen faucet is a practical safeguard, especially in older homes.
What's in the Treatment Process
Amherst's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 30.9 ppb (39% of the legal limit, but 206x the EWG guideline) and HAA5 at 26.3 ppb (44% of the legal limit, but 263x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.0443 ppb, which is 2.2x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. 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) | 10 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 22 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 | 5 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.9 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.888 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Good news for Amherst 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.
How to Test Your Water in Amherst
Lead enters water from your home's plumbing, not the treatment plant — so Amherst's city-wide average of 5 ppb may not match your tap. Testing your specific faucet is the only way to know. Run cold water for 30 seconds before collecting a sample.
Free option: Request Amherst Water's annual Consumer Confidence Report for official city-level data.
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About Amherst's Water Supply
Water Utility: Amherst Water
Water Source: Atkins Reservoir (Surface Water)
Population Served: 39,263
Hardness: 10 PPM (0.6 grains per gallon)
Amherst's drinking water comes from surface sources — Atkins Reservoir. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 39,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Amherst 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 Amherst Water in Amherst, MA, including ZIP codes:
01002, 01003, 01004, 01005, 01007, 01009, 01012, 01031, 01032, 01033, 01035, 01037, 01038, 01039, 01053, 01054, 01059, 01060, 01061, 01062, 01063, 01066, 01072, 01079, 01082, 01083, 01088, 01092, 01093, 01094, 01096, 01301, 01302, 01330, 01331, 01338, 01340, 01341, 01342, 01344, 01347, 01349, 01351, 01354, 01355, 01364, 01366, 01370, 01373, 01375, 01376, 01379, 01380, 01436
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Amherst to Other Massachusetts Cities
Frequently Asked Questions About Amherst Water
Is Amherst tap water safe to drink?
Where does Amherst's water come from?
Do I need a water softener in Amherst?
What are disinfection byproducts in Amherst's water?
Is chromium-6 in Amherst's water?
Can I drink Amherst tap water straight from the faucet?
How does Amherst compare to the Massachusetts average?
What water filter is best for Amherst?
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.