Microbac Laboratories, Inc- Dayville-CT

Dayville, CT · 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: 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: yes (Connecticut list)

Lab facts

Listed by: Pennsylvania (Pennsylvania DEP - Laboratory Accreditation Program)
Address: 61 Louisa Viens Drive, Dayville, CT 06241 · Open in Google Maps
Phone: (860) 774-6814
Public / homeowner samples: Public samples: ask the lab
PA DEP accreditation report has no homeowner-sample flag
Location note: Lab is in CT, certified by Pennsylvania (often used as a mail-in lab).
Left blank on the list: The Pennsylvania list (version STALE - report dated 6/11/2024) gives no website for this lab.

Certification record

Certificate ID: PA DEP 68-04413
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	Connecticut, Massachusetts, Rhode Island
Nitrate	Not named on this list	Connecticut, Maryland, North Carolina, Tennessee
Arsenic	Named on the official list	Connecticut, Maryland, North Carolina, Tennessee, Virginia
Lead	Named on the official list	Connecticut, Maryland, Massachusetts, North Carolina, Tennessee, Virginia
PFAS	Not named on this list	Massachusetts
Uranium	Named on the official list	Connecticut, Maryland, Massachusetts, Virginia
Radon (water)	Not named on this list
Manganese	Named on the official list	North Carolina, Virginia
VOCs	Named on the official list	Connecticut, Maryland, North Carolina, Tennessee, Virginia
Other metals	Named on the official list	Connecticut, Maryland, North Carolina, Tennessee, Virginia

Groups as written on the state list (131)

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-Dibromo-3-chloropropane (DBCP, Dibromochloropropane)
1,2-Dibromoethane (EDB, Ethylene dibromide)
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
2,4,5-TP (Silvex)
2,4-D
2-Chlorotoluene
3-Hydroxycarbofuran
4-Chlorotoluene
Alachlor (Lasso)
Aldicarb (Temik)
Aldicarb sulfone
Aldicarb sulfoxide
Aldrin (HHDN)
Aluminum
Antimony
Arsenic
Atrazine
Barium
Benzene
Benzo[a]pyrene
Beryllium
… and 91 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.

Connecticut · PH-0465 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: yes (per state)
CT DPH In-State Approved Commercial Laboratories Certified to Test Drinking Water (10/09/2026)
Virginia · VA lab 460279 / EPA CT00008 · Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the lab
Virginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
Massachusetts · M-CT008 · Coliform / E. coli, Lead, PFAS, Uranium · Public samples: yes (per state)
MassDEP Certified Laboratories Offering Analytical Services for Private Well Owners and Residential Customers (Created and published on 12/18/2025)
Tennessee · 04903 · Nitrate, Arsenic, Lead, VOCs, Other metals · Public samples: ask the lab
TDEC Division of Water Resources - Commercial Laboratories Certified for Drinking Water Analysis (10/2/2026 (page footers 10/06/2026))
Maryland · 349 · Nitrate, Arsenic, Lead, Uranium, VOCs, Other metals · Public samples: ask the lab
Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (Latest Revisions: 10/1/2026)
North Carolina · 09700 · Nitrate, Arsenic, Lead, Manganese, VOCs, Other metals · Public samples: ask the lab
NC SLPH Environmental Sciences - Certified Drinking Water Laboratories (Commercial) (generated on request (no date printed), fetched 2026-11-07)
Rhode Island · LAO00346 · Coliform / E. coli · Public samples: yes (per state)
RIDOH - Out of State Analytical Laboratories (March 18, 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