HP ENVIRONMENTAL

At a glance

What it is certified to test

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

Price

not published on the state list: ask the lab 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

104 Elden Street, Suite 11, Herndon, VA 20170 · Open in Google Maps

Phone

(703) 471-4200

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.

Location note

Lab is in VA, certified by Maryland (often used as a mail-in lab).

Left blank on the list

The Maryland list (version Latest Revisions: 10/1/2026) gives no website for this lab.

Certification record

Certificate ID

319

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 3, 4; Metals 1" (codes keyed to MDE's List of Approved Contaminants, Revised 10/10/2024). MDE prints no expiry date. MDE's key describes Microbiology Group 4 only as "Enzyme Substrate Determinations" and does not name coliform bacteria or E. coli, so no bacteria certification is shown. Ask the lab. MDE lists this lab under "Out of State Labs".

Also certified by other states

Same business (same street address and ZIP) on another state's official list. Each state certifies separately, so each listing keeps its own source.

• Virginia · VA lab 156 / EPA VA01102 · Coliform / E. coli, Lead, Other metals · Public samples: ask the lab
  Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)

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).