Precision Water Lab

At a glance

What it is certified to test

1 of the 9 common well tests on the IL 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

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

Address

1705 State Route 161, Centralia, IL 62801 · Open in Google Maps

Phone

(618) 533-0758

Public / homeowner samples

Public samples: ask the lab

Not stated in the list.

Left blank on the list

The Illinois list (version Revision Date Thursday, December 4, 2025) gives no website for this lab.

Certification record

Certificate ID

IDPH Lab # 17600

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, Colilert 18 Quantitray, Colilert 24 P/A, Colilert 24 Quantitray. IDPH lab type: Commercial. Repaired: IDPH's list prints an email address after the street; it is not shown. 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.

Nearest labs that take homeowner samples

No other lab that takes homeowner samples is within 25 miles of this lab; the nearest is 50 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: Marion County, IL

• Private wells: about 1,102 people, 3% of Marion County’s 38,339 residents (USGS, 2015); rank 86 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 15 private-well users (95% range 12 to 20; 2010 base), rank 89 of 102 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 62% of 17,334 housing units were built before 1980, about the same as 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): 6 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).