Water Lab (EJ Water Coop)

At a glance

What it is certified to test

1 of the 9 common well tests on the IL list (see which)

Price

no per-test price printed on the lab’s website when we read it (14 Nov 2026): ask for a quote

Turnaround

“Results are provided through a combination of mechanisms including phone and email reporting and will be provided the next day.” (lab’s website)

Homeowner samples

not stated: ask the lab

Lab facts

Listed by

Illinois (Illinois EPA - Environmental Laboratory Accreditation Program (IL ELAP, chemistry) and Illinois Department of Public Health (IDPH, water microbiology))

Address

108 South Main Street, Dieterich, IL 62424 · Open in Google Maps

Phone

(217) 925-5566

Website

ejwatercoop.com

Not on the state list: found and checked by us, 14 Nov 2026

Public / homeowner samples

Public samples: ask the lab

Not stated in the list.

Certification record

Certificate ID

IDPH Lab # 17602

Issued by

Illinois EPA - Environmental Laboratory Accreditation Program (IL ELAP, chemistry) and Illinois Department of Public Health (IDPH, water microbiology) (certification program)

Expiry on the list

Jan 2026 · Date on list has passed (288 days ago)

List version

Illinois Department of Public Health - Certified Water Microbiology Laboratories, version Revision Date Thursday, December 4, 2025

We fetched it

15 Nov 2026 (file SHA-256 ff3504484187…) · 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*').

IDPH certifies this lab for these water microbiology methods: Colilert 18 P/A. IDPH lab type: Commercial. The microbiology expiry month printed on IDPH's list (Jan 2026) has passed (checked Nov 15, 2026). Check the lab's current status with IDPH.

Homeowner service and turnaround (lab’s own website)

• Turnaround (as printed): Results are provided through a combination of mechanisms including phone and email reporting and will be provided the next day. source
• Prices: no price printed on the lab’s website when we read it on 14 Nov 2026: ask for a quote.

From the lab’s own website, read 14 Nov 2026 and re-read by a second checker; next check due by 12 Feb 2027. Certification fields come from the state list only.

Nearest labs that take homeowner samples

No other lab that takes homeowner samples is within 25 miles of this lab; the nearest is 95 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: Effingham County, IL

• Private wells: about 11,302 people, 33% of Effingham County’s 34,371 residents (USGS, 2015); rank 23 of 102 counties in Illinois by people on wells.

• EPA radon zone (indoor air): Zone 2: moderate potential (average indoor radon may be between 2 and 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 146 private-well users (95% range 113 to 189; 2010 base), rank 52 of 102 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 54% of 15,413 housing units were built before 1980, below the state share of 63%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.
• PFAS in public water nearby (public supply, not your well): 4 public systems serving this county reported EPA UCMR 5 results; 0 had a PFOA or PFOS sample at or above 4.0 ng/L.

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 Illinois 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).