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Is Derby, CT tap water safe?

2 utilities serve Derby, by EPA’s records. Here is what EPA’s and CDC’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

Neither of the 2 utilities serving Derby has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records.

Regional Water Authority, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 10.7 ppt, above EPA’s new limit, which takes effect in 2029.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Derby’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Regional Water Authority’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Derby

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Connecticut certifies.

The 3 labs Connecticut certifies closest to Derby, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Aquarion Water Trap Falls Water Quality Lab

    Shelton, CT · about 3 miles

    Certified for bacteria

    (203) 445-7362

  • Aquatek Labs, Inc.

    Woodbridge, CT · about 5 miles

    Certified for bacteria, nitrate, metals, minerals and other inorganics, organic chemicals, radioactivity

    (203) 389-1824

  • Baron Analytical Laboratories LLC

    Milford, CT · about 8 miles

    Certified for bacteria, nitrate, metals, minerals and other inorganics, disinfection byproducts

    (203) 874-5678

All 86 certified labs for Connecticut

ZIP codes in Derby

Which ZIP codes are in Derby: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Connecticut DPH, approved commercial laboratories certified to test drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Derby

Other towns in New Haven County with a page of their own.

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