Assurance Water Laboratory

At a glance

What it is certified to test

2 of the 9 common well tests on the MI 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

Michigan (Michigan Department of Environment, Great Lakes, and Energy (EGLE) - Laboratory Certification Program)

Address

103 North Bowery Avenue, Gladwin, MI 48624 · Open in Google Maps

Phone

(989) 426-9431

Public / homeowner samples

Public samples: ask the lab

Not stated in the list.

Left blank on the list

The Michigan list (version SOM Certified Labs - Chemistry 3/11/2026 (chemistry, microbiological lists)) gives no website for this lab.

Certification record

Certificate ID

9952

Issued by

Michigan Department of Environment, Great Lakes, and Energy (EGLE) - Laboratory Certification Program (certification program)

List version

EGLE - State of Michigan Certified Laboratories: Chemistry + EGLE - State of Michigan Certified Laboratories: Microbiological, version SOM Certified Labs - Chemistry 3/11/2026 (chemistry, microbiological lists)

We fetched it

15 Nov 2026 (file SHA-256 67116a31f5aa…) · 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*').

EGLE lists 3 drinking-water analytes this lab is certified for (analyte-level list). On EGLE's chemistry and microbiological lists.

Nearest labs that take homeowner samples

No other lab that takes homeowner samples is within 25 miles of this lab; the nearest is 47 miles away. Distances are straight-line from the address on the state list (approx. = ZIP-code centre). “Takes homeowner samples” comes from a state list column or the lab’s own website, as named.

Price and turnaround as printed on each lab’s own website and checked by a second reader; – = not published or not read yet.

Around this lab: Gladwin County, MI

• Private wells: about 20,448 people, 81% of Gladwin County’s 25,164 residents (USGS, 2015); rank 39 of 83 counties in Michigan by people on wells.

• EPA radon zone (indoor air): Zone 3: low potential (average indoor radon may be less than 2 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 1,980 private-well users (95% range 1,588 to 2,472; 2010 base), rank 30 of 82 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 49% of 17,037 housing units were built before 1980, below the state share of 62%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.

County figures describe where the lab is, not the lab. Sources: USGS 2015 water use and 2017 arsenic estimates, EPA radon zones, Census ACS table B25034 (2020–2024), EPA UCMR 5 (2023–2026); details and links on the sources page.

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 Michigan 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).