Naturally occurring iron and manganese are common in the groundwater under Halifax's bog-country wells. The Richmond Park wells are specifically treated with potassium permanganate to strip these minerals, but sediment can still occasionally reach household taps after flushing, main work, or nearby construction — an aesthetic issue, not a regulated health hazard, though disruptive enough that the Water Department fields ongoing complaints and takes reports directly.
PFAS ("per- and polyfluoroalkyl substances") are a family of manufactured chemicals used for decades in nonstick, waterproof, and stain-resistant products. They break down extremely slowly in the environment, which is why they're nicknamed "forever chemicals," and why they now show up in trace amounts in water systems across the country — including, as of late 2025, right at the legal limit in one of Halifax's own wells.
Every water utility publishes an annual Consumer Confidence Report listing every contaminant it tested for, the detected range, and the legal limit. The most useful column is usually the one comparing your utility's result to the health-based goal, not just the legal limit — those two numbers aren't always the same thing.
If your home is on a private well rather than town water, none of the municipal testing above applies to you directly. Massachusetts DEP recommends private well owners test independently, since well water isn't subject to Safe Drinking Water Act monitoring requirements.
Meeting a legal limit isn't the same as having zero of a contaminant present — Halifax's own Richmond Park Well 1 came right up to the state PFAS6 line in Q4 2025 without technically crossing it. Different filtration approaches address different problems:
Whole-house sediment filters or dedicated iron/manganese filtration media address discoloration directly, catching mineral particles before they reach household fixtures — useful for Halifax households dealing with recurring brown-water events.
Effective against chlorine taste and odor, many disinfection byproducts, and some PFAS compounds, depending on the specific carbon media and contact time. Common in pitcher filters, faucet-mount units, and whole-house systems.
The most thorough option for PFAS, nitrates, and a broad range of dissolved contaminants. Typically installed under a kitchen sink for drinking and cooking water specifically — worth considering given Halifax's PFAS6 result landed right at the legal threshold.
Not sure where to start? A free household water test is the easiest way to figure out whether filtration makes sense for your specific home, and if so, which approach fits.