At a glance
- What it is certified to test
- 5 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 (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
- Maryland (Maryland Department of the Environment (MDE) - Water Supply Program, Laboratory Certification Program)
- Address
- 1941 Reymet Road, Richmond, VA 23237 · Open in Google Maps
- Phone
- (804) 358-8295
- Website
- www.onterris.comNot on the state list: found and checked by us, 15 Nov 2026
- 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 VA, certified by Maryland (often used as a mail-in lab).
Certification record
- Certificate ID
- 341
- 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 | Named on the official list | Florida, North Carolina, Pennsylvania, Virginia |
| Nitrate | Named on the official list | Florida, North Carolina, Pennsylvania, Virginia |
| Arsenic | Named on the official list | Florida, North Carolina, Pennsylvania, Virginia |
| Lead | Named on the official list | Florida, North Carolina, Pennsylvania, South Carolina, Virginia |
| PFAS | Not named on this list | |
| Uranium | Not named on this list | Florida, North Carolina, Virginia |
| Radon (water) | Not named on this list | |
| Manganese | Not named on this list | Florida, North Carolina, Pennsylvania, Virginia |
| VOCs | Named on the official list | Florida, North Carolina, Pennsylvania, Virginia |
| Other metals | Named on the official list | Florida, North Carolina, Pennsylvania, Virginia |
Groups as written on the state list (18)
- Microbiology Group 4: Enzyme Substrate Determinations
- Microbiology Group 5: E.coli Enumeration
- Trace Metals Group 1: Lead, Copper
- Trace Metals Group 2: Antimony, Arsenic, Barium, Beryllium, Cadmium, Chromium, Mercury, Selenium, Thallium
- Inorganics Group 1: Nitrate-N
- Inorganics Group 2: Nitrite-N
- Inorganics Group 3: Fluoride
- Inorganics Group 5: Cyanide
- Inorganics Group 6: Chlorite
- Organics, Trihalomethanes: Chloroform, Bromodichloromethane, Chlorodibromomethane, Bromoform, Total Trihalomethanes
- 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 (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)
- Haloacetic Acids (HAA5): Monochloroacetic Acid, Monobromoacetic Acid, Dichlororacetic Acid, Trichloroacetic Acid, Dibromoacetic Acid
- Organics, Pesticides Group 1: Endrin, Lindane, Methoxychlor, Toxaphene, Chlordane, Heptachlor, Heptachlor epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene
- Organics, Pesticides Group 2: Alachlor, Atrazine, Simazine
- Organics, Pesticides Group 4: PCBs (as Aroclors), PCBs (as decachlorobiphenyls)
- 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 "Micro 4, 5; Metals 1, 2; Inorganics 1, 2, 3, 5, 6; THMs; VOCs; SOCs 1,3; HAA5; Pesticides 1, 2, 4; 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.
- Virginia · VA lab 460021 / EPA VA00913 · Coliform / E. coli, Nitrate, 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 68-03503 · Coliform / E. coli, Nitrate, Arsenic, Lead, Manganese, VOCs, Other metals · Public samples: ask the labPA DEP Accredited Labs Report - Drinking Water (chemistry + microbiology) (STALE - report dated 6/11/2024)
- Florida · FL DOH E871222 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, Manganese, VOCs, Other metals · Public samples: ask the labFlorida DOH - Laboratories Certified Under NELAP (DEP Qlik app): Analyte Search + Organization Name and Location Search, Matrix = Drinking Water, Certification Status = Accredited, Active labs (DOH Version: 11/07/2026 08:30:01 (Qlik app refresh 11/9/2026 4:26:47 AM; live database))
- North Carolina · 51714 · Coliform / E. coli, Nitrate, Arsenic, Lead, Uranium, 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)
- South Carolina · 93016001 · Lead · Public samples: ask the labSCDES Commercial Environmental Laboratory Mapping (CELMAPP) - certified commercial laboratories, Safe Drinking Water (no date printed; CELMAPP data last refreshed 2026-10-10 (LastRefreshDate of SCDES's details table))
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