At a glance
- What it is certified to test
- 5 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
- yes (Connecticut list)
Lab facts
- Listed by
- Maryland (Maryland Department of the Environment (MDE) - Water Supply Program, Laboratory Certification Program)
- Address
- 61 Louisa Viens Drive, Dayville, CT 06241 · Open in Google Maps
- Phone
- (860) 774-6814
- Public / homeowner samples
- Public samples: ask the labNot 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 CT, 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
- 349
- 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
| Contaminant | On this state list | Same lab, other state lists |
|---|---|---|
| Coliform / E. coli | Not named on this list | Connecticut, Massachusetts, Rhode Island |
| Nitrate | Named on the official list | Connecticut, North Carolina, Tennessee |
| Arsenic | Named on the official list | Connecticut, North Carolina, Pennsylvania, Tennessee, Virginia |
| Lead | Named on the official list | Connecticut, Massachusetts, North Carolina, Pennsylvania, Tennessee, Virginia |
| PFAS | Not named on this list | Massachusetts |
| Uranium | Named on the official list | Connecticut, Massachusetts, Pennsylvania, Virginia |
| Radon (water) | Not named on this list | |
| Manganese | Not named on this list | North Carolina, Pennsylvania, Virginia |
| VOCs | Named on the official list | Connecticut, North Carolina, Pennsylvania, Tennessee, Virginia |
| Other metals | Named on the official list | Connecticut, North Carolina, Pennsylvania, Tennessee, Virginia |
Groups as written on the state list (19)
- Organic Chemicals (VOCs) Group 1: Benzene, Carbon tetrachloride, 1,2-Dichloroethane, Trichloroethylene, 1,1-Dichloroethylene, 1,1,1-Trichloroethane, 1,4-Dichlorobenzene, Vinyl Chloride, 1,2-Dichlorobenzene, cis-1,2-Dichloroethene, trans-1,2-Dichloroethene, 1,2-Dichloropropane, Ethylbenzene, Styrene, Tetrachloroethylene, Toluene, (total) Xylenes, Chlorobenzene, Dichloromethane, 1,2,4-Trichlorobenzene, 1,1,2-Trichloroethane
- Organics, Trihalomethanes: Chloroform, Bromodichloromethane, Chlorodibromomethane, Bromoform, Total Trihalomethanes
- Haloacetic Acids (HAA5): Monochloroacetic Acid, Monobromoacetic Acid, Dichlororacetic Acid, Trichloroacetic Acid, Dibromoacetic Acid
- Organics (SOC 1): Benzo(a)pyrene, Di(2-ethylhexyl)adipate, Di(2-ethylhexyl)phthalate, Hexachlorobenzene, Hexachlorocyclopentadiene, Endrin, Lindane, Methoxychlor, Toxaphene, Chlordane, Heptachlor, Heptachlor epoxide, Alachlor, Atrazine, Simazine, PCBs (as decachlorobiphenyls), Pentachlorophenol
- Organics (SOC 3): Ethylene Dibromide (EDB), Dibromochloropropane (DBCP)
- Inorganics Group 1: Nitrate-N
- Inorganics Group 2: Nitrite-N
- Inorganics Group 3: Fluoride
- Inorganics Group 5: Cyanide
- Trace Metals Group 1: Lead, Copper
- Trace Metals Group 2: Antimony, Arsenic, Barium, Beryllium, Cadmium, Chromium, Mercury, Selenium, Thallium
- Radiologicals: Uranium (individually)
- Organics, Pesticides Group 1: Endrin, Lindane, Methoxychlor, Toxaphene, Chlordane, Heptachlor, Heptachlor epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene
- Organics, Pesticides Group 2: Alachlor, Atrazine, Simazine
- Organics, Pesticides Group 3: Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Carbofuran, Oxamyl (Vydate)
- Organics, Pesticides Group 4: PCBs (as Aroclors), PCBs (as decachlorobiphenyls)
- Organics, Pesticides Group 5: Diquat
- Organics, Pesticides Group 7: Glyphosate
- Organics, Herbicides: 2,4-D, 2,4,5-TP (Silvex), Pentachlorophenol, Dinoseb, Dalapon, Picloram
- 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 "VOCs; THMs; HAA5; SOCs 1, 3; Inorganics 1, 2, 3, 5; Metals 1, 2, Uranium; Pesticides 1, 2, 3, 4, 5, 7; Herbicides" (codes keyed to MDE's List of Approved Contaminants, Revised 10/10/2024). MDE prints no expiry date. 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.
- 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 labVirginia DCLS - Drinking Water Certified Labs (analyte detail) (Current as of 8/1/2026)
- Pennsylvania · PA DEP 68-04413 · Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the labPA DEP Accredited Labs Report - Drinking Water (chemistry) (STALE - report dated 6/11/2024)
- 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 labTDEC Division of Water Resources - Commercial Laboratories Certified for Drinking Water Analysis (10/2/2026 (page footers 10/06/2026))
- North Carolina · 09700 · Nitrate, Arsenic, Lead, Manganese, VOCs, Other metals · Public samples: ask the labNC 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 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).
Certified as ofLatest Revisions: 10/1/2026
Maryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program). Fetched 2026-11-07 (UTC). File SHA-256 9d19de9053bf…
Open the official source list