WASHINGTON COUNTY DIVISION OF ENVIRONMENTAL MANAGEMENT LABORATORY

At a glance

What it is certified to test

3 of the 9 common well tests on the MD list (see which)

Price

no per-test price printed on the lab’s website when we read it (14 Nov 2026): ask for a quote

Turnaround

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

Homeowner samples

not stated: ask the lab

Lab facts

Listed by

Maryland (Maryland Department of the Environment (MDE) - Water Supply Program, Laboratory Certification Program)

Address

16232 Elliott Parkway, Williamsport, MD 21795 · Open in Google Maps

Phone

(240) 313-2626

Website

www.washco-md.net/water-quality

Not on the state list: found and checked by us, 14 Nov 2026

Public / homeowner samples

Public samples: ask the lab

Not stated per lab. MDE's Be Well Wise page for private well owners says: "Have your water tested periodically by a state-certified laboratory that conducts a drinking water test." It names no lab, and MDE's list does not say which labs take samples from homeowners.

Certification record

Certificate ID

G-1025

Issued by

Maryland Department of the Environment (MDE) - Water Supply Program, Laboratory Certification Program (certification program)

List version

Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program), version Latest Revisions: 10/1/2026

We fetched it

7 Nov 2026 (file SHA-256 9d19de9053bf…) · open the state file

Tests on the state list

• 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*').

MDE prints the approved tests as "Micro 4, 5; Metals 1; Inorganics 1, 2, 3" (codes keyed to MDE's List of Approved Contaminants, Revised 10/10/2024). MDE prints no expiry date.

Nearest labs that take homeowner samples

1 other certified lab that takes homeowner samples is 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: Washington County, MD

• Private wells: about 43,831 people, 29% of Washington County’s 149,585 residents (USGS, 2015); rank 14 of 24 counties in Maryland by people on wells.
• At house sale: Statewide (Real Property Article) has a well_test rule (Md. Code, Real Property § 10-713 (Ch. 587 of 2023, HB 11, Private Well Safety Act of 2023)). What it requires

• EPA radon zone (indoor air): Zone 1: highest potential (average indoor radon may be greater than 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 909 private-well users (95% range 573 to 1,458; 2010 base), rank 18 of 24 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 57% of 64,145 housing units were built before 1980, above the state share of 51%. 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): 3 public systems serving this county reported EPA UCMR 5 results; 1 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 Maryland 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).