Phase Separation Science Inc

Baltimore, MD · Public samples: ask the lab

Old list: check before you rely on it

This list is from PA DEP's bulk drinking-water reports printed June 11, 2024 (chemistry and microbiology; the microbiology file is named 06-13-2024). PA DEP's own private-well water-testing page still links these two June 2024 reports (checked Nov 14, 2026); its live lab search did not respond to us on Oct 29 or Nov 14, 2026. Labs may have been added, dropped or changed since then.

At a glance

What it is certified to test: 5 of the 9 common well tests on the PA list (see which)
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: not stated: ask the lab

Lab facts

Listed by: Pennsylvania (Pennsylvania DEP - Laboratory Accreditation Program)
Address: 6630 Baltimore National Pike, Baltimore, MD 21228 · Open in Google Maps
Phone: (410) 747-8770
Website: www.phaseonline.com
Not on the state list: found and checked by us, 15 Nov 2026
Public / homeowner samples: Public samples: ask the lab
PA DEP accreditation report has no homeowner-sample flag
Location note: Lab is in MD, certified by Pennsylvania (often used as a mail-in lab).

Certification record

Certificate ID: PA DEP 68-03330
Issued by: Pennsylvania DEP - Laboratory Accreditation Program (certification program)
List version: PA DEP Accredited Labs Report - Drinking Water (chemistry), version STALE - report dated 6/11/2024
We fetched it: 29 Oct 2026 (file SHA-256 415f95aac8bd…) · open the state file

Tests on the state list

5 of the 9 well-water tests we track are named for this lab on the Pennsylvania list (version STALE - report dated 6/11/2024).
Contaminant	On this state list	Same lab, other state lists
Coliform / E. coli	Not named on this list
Nitrate	Named on the official list	Maryland, Virginia
Arsenic	Named on the official list	Maryland, Virginia
Lead	Named on the official list	Maryland, Virginia
PFAS	Not named on this list
Uranium	Not named on this list
Radon (water)	Not named on this list
Manganese	Named on the official list	Virginia
VOCs	Named on the official list	Maryland, Virginia
Other metals	Named on the official list	Maryland, Virginia

Groups as written on the state list (97)

1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane
1,1,2,2-Tetrachloroethane
1,1,2-Trichloroethane
1,1-Dichloroethane
1,1-Dichloroethene (1,1-Dichloroethylene)
1,1-Dichloropropene
1,2,3-Trichlorobenzene
1,2,3-Trichloropropane (1,2,3-TCP)
1,2,4-Trichlorobenzene
1,2,4-Trimethylbenzene
1,2-Dichlorobenzene (o-Dichlorobenzene)
1,2-Dichloroethane
1,2-Dichloropropane
1,3,5-Trimethylbenzene
1,3-Dichlorobenzene (m-Dichlorobenzene)
1,3-Dichloropropane
1,4-Dichlorobenzene (p-Dichlorobenzene)
1,4-Dioxane (1,4-Diethyleneoxide)
2,2-Dichloropropane
2-Chlorotoluene
4-Chlorotoluene
Alkalinity as CaCO3
Aluminum
Antimony
Arsenic
Barium
Benzene
Beryllium
Bromobenzene
Bromochloromethane
Bromodichloromethane
Bromoform
Cadmium
Carbon tetrachloride
Chloride
Chlorobenzene
Chloroethane
Chloroform
Chromium
… and 57 more

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*').

STALE LIST: PA DEP bulk Accredited Labs Report(s) dated 6/11/2024. The live PA DEP lab search was unreachable on 2026-10-29 (HTTP 500 / TLS error). Confirm current accreditation with PA DEP or the lab.

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 460156 / EPA MD00074 · Nitrate, Arsenic, Lead, Manganese, VOCs, Other metals · Public samples: ask the lab
Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
Maryland · 179 · Nitrate, Arsenic, Lead, VOCs, Other metals · Public samples: ask the lab
Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (Latest Revisions: 10/1/2026)

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 Pennsylvania 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).

Old list · certified as ofSTALE - report dated 6/11/2024

PA DEP Accredited Labs Report - Drinking Water (chemistry). Fetched 2026-10-29 (UTC). File SHA-256 415f95aac8bd…

Open the official source list