From PFAS and disinfection byproducts to lead, hardness, and iron, here’s a plain-English guide to what’s commonly found in Massachusetts water and how to treat each one.
Massachusetts water comes from a mix of protected reservoirs (like the MWRA’s Quabbin and Wachusett), municipal wells, and private wells, and each source brings its own common issues. Reservoir systems tend to have disinfection byproducts and can carry PFAS and lead picked up from home plumbing; groundwater and wells more often bring hardness, iron, manganese, and sometimes arsenic or nitrate.
This guide walks through the contaminants we see most often in Massachusetts homes, what each one means, and the filtration that treats it. The only way to know what’s in your water is to test it, and CleanTap’s in-home test is free.
Massachusetts’ large reservoir systems deliver high-quality water at the source, but two issues commonly show up at the tap:
TTHMs and haloacetic acids form when chlorine reacts with organic matter. Treated with activated-carbon filtration.
Used to disinfect; affects taste and smell. Carbon filtration removes it for better-tasting water.
Not in the reservoir, picked up from older home plumbing. Treated with RO or an NSF/ANSI 53 lead filter.
“Forever chemicals” found in many supplies. Treated with reverse osmosis or specialty PFAS media.
Private wells aren’t tested by any utility, and municipal groundwater can carry minerals the reservoirs don’t. The most common well/groundwater issues in Massachusetts:
Calcium & magnesium that scale pipes and appliances and spot glassware. Treated with a water softener.
Stain fixtures and laundry and add a metallic taste. Treated with specialty oxidizing/filter media.
Naturally occurs in some MA bedrock aquifers. Treated with targeted adsorptive media or RO.
From fertilizer/septic; a concern for infants. Treated with RO or ion exchange.
Public water customers can look up their town’s most recent results, we’ve published town-by-town water quality reports built from real EWG Tap Water Database data. But the most accurate picture of your home, including anything your plumbing adds, like lead, comes from testing at your own tap.
CleanTap’s free in-home water test checks the issues that matter for your home and gives you a clear report. Then we match certified filtration to what’s actually there, no scare tactics, no one-size-fits-all systems.
On reservoir/city systems: disinfection byproducts (TTHMs, haloacetic acids), chlorine/chloramine taste, PFAS, and lead from home plumbing. On wells/groundwater: hardness, iron and manganese, and sometimes arsenic or nitrate.
Public customers can check their town’s latest results (we publish town-by-town reports from EWG data), but testing at your own tap is the only way to capture what your home’s plumbing adds, like lead. Our in-home test is free.
Legal limits and health-based guidelines aren’t the same, water can meet regulations and still carry PFAS, lead, or byproducts you’d prefer to reduce. Testing tells you what, if anything, is worth treating.
No single filter handles every contaminant. That’s why we test first and match the right combination, carbon, reverse osmosis, softening, or specialty media, to your actual water.
Book a free in-home water test. We’ll test the issues that matter for your home, explain the results, and match certified filtration to what’s actually there.
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