Is Quincy, MA Tap Water Safe to Drink?
Yes, Quincy tap water is safe to drink. Hardness is low at 14 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Quincy Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Quincy Compares
Quincy's water is 90% softer than the national average of 138 PPM - ranking in the bottom 98% for hardness nationwide. Most homes here do not need a softener. Within Massachusetts, it ranks #14 of 21 cities (26% below the state average of 19 PPM). Among mid-size cities (100k-200k), Quincy ranks #187 of 189 for hardness.
What Quincy's Water Means for Your Home
Hardness: 14 PPM - Low Concern
Quincy's water is soft at just 14 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. Quincy is softer than 98% of US cities. If you're thinking about water treatment in Quincy, contaminant filtration is the place to invest.
Contaminants & Safety
Lead levels deserve attention. At 8.7 ppb, Quincy 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
Quincy's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 17.2 ppb (22% of the legal limit, but 115x the EWG guideline) and HAA5 at 14.7 ppb (25% of the legal limit, but 147x 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. 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) | 14 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 17 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 | 8.7 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 0.7 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.141 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
How to Test Your Water in Quincy
Lead enters water from your home's plumbing, not the treatment plant — so Quincy's city-wide average of 8.7 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 City of Quincy Water's annual Consumer Confidence Report for official city-level data.
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About Quincy's Water Supply
Water Utility: City of Quincy Water
Water Source: Blue Hills Reservoir & MWRA (Surface Water)
Population Served: 106,000
Hardness: 14 PPM (0.8 grains per gallon)
Quincy's drinking water comes from surface sources — Blue Hills Reservoir & MWRA. 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 106,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Quincy 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 Quincy Water in Quincy, MA, including ZIP codes:
02018, 02025, 02027, 02040, 02043, 02044, 02045, 02051, 02055, 02059, 02060, 02061, 02066, 02126, 02136, 02137, 02169, 02170, 02171, 02184, 02185, 02186, 02187, 02188, 02189, 02190, 02191, 02269, 02368
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Quincy to Other Massachusetts Cities
Frequently Asked Questions About Quincy Water
Is Quincy tap water safe to drink?
Where does Quincy's water come from?
Do I need a water softener in Quincy?
What water filter is best for Quincy?
Is Quincy water safe for babies and infants?
What are disinfection byproducts in Quincy's water?
Can I drink Quincy tap water straight from the faucet?
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 Quincy Homeowners Actually Buy
Common purchases for homes with 14 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Quincy's water data.