MWRA Central Laboratory

At a glance

Price

no per-test price printed on the lab’s website when we read it (15 Nov 2026): ask for a quote

Turnaround

not stated on the state list or the lab’s website: ask when you order

Homeowner samples

no (state list)

Lab facts

Listed by

Massachusetts (Massachusetts Department of Environmental Protection (MassDEP) - Drinking Water Laboratory Certification)

Address

Deer Island Treatment Plant, Winthrop, MA 02152 · Open in Google Maps

Website

www.mwra.com

Not on the state list: found and checked by us, 15 Nov 2026

Public / homeowner samples

Not marked as taking public samples

MassDEP list 'Offers services to residential customers?': No

Left blank on the list

The Massachusetts list (version Created and published on 12/18/2025) gives no phone for this lab.

Certification record

Certificate ID

M-MA153

Issued by

Massachusetts Department of Environmental Protection (MassDEP) - Drinking Water Laboratory Certification (certification program)

List version

MassDEP Certified Laboratories Offering Analytical Services for Private Well Owners and Residential Customers, version Created and published on 12/18/2025

We fetched it

15 Nov 2026 (file SHA-256 f56b9b720b22…) · open the state file

Tests on the state list

This list does not break certification down by analyte. Ask the lab which tests it is certified for; the groups as written on the list are below.

• Named on the official list The state list names this analyte (or a column for it) for this lab.
• Group-level certification Certified for a parent group (e.g. 'Inorganics') that includes this analyte. Confirm the specific test with the lab.
• Partial group certification The list marks the group as 'Partial'. Confirm this analyte with the lab.
• Subcontracted The lab sends this analyte to another accredited lab (MDH 'X*').

MassDEP lists this certified lab as not offering services to residential customers and gives no analyses for it.

Nearest labs that take homeowner samples

7 other certified labs that take homeowner samples are within 25 miles of this lab. Distances are straight-line from the address on the state list (approx. = ZIP-code centre). “Takes homeowner samples” comes from a state list column or the lab’s own website, as named.

Price and turnaround as printed on each lab’s own website and checked by a second reader; – = not published or not read yet.

Around this lab: Suffolk County, MA

• Private wells: about 0 people, 0% of Suffolk County’s 778,121 residents (USGS, 2015); rank 14 of 14 counties in Massachusetts by people on wells.
• At house sale: Statewide (Title 5) has a septic system rule (310 CMR 15.301-15.305 (Title 5)). What it requires

• EPA radon zone (indoor air): Zone 3: low potential (average indoor radon may be less than 2 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Older homes (Census ACS 2020–2024): 72% of 357,290 housing units were built before 1980, above the state share of 67%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.
• PFAS in public water nearby (public supply, not your well): 4 public systems serving this county reported EPA UCMR 5 results; 0 had a PFOA or PFOS sample at or above 4.0 ng/L.

County figures describe where the lab is, not the lab. Sources: USGS 2015 water use and 2017 arsenic estimates, EPA radon zones, Census ACS table B25034 (2020–2024), EPA UCMR 5 (2023–2026); details and links on the sources page.

Before you send a sample

Call the lab to confirm it's currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Bacteria samples have short holding times. Status can change between list updates. To check a status, contact the Massachusetts certification program.

Is this your lab?

Labs can ask for corrections through the agency that publishes their state list. Homeowner service, prices and turnaround above come only from the lab’s own website. To ask us to correct or remove this listing, write to us (how we handle listings).