Rockford Water Division Environmental Lab

At a glance

What it is certified to test

1 of the 9 common well tests on the WI 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

Wisconsin (Wisconsin DNR / DATCP (microbiology))

Address

1111 Cedar St, Rockford, IL 61102 · Open in Google Maps

Phone

(776) 348-7373

Public / homeowner samples

Public samples: ask the lab

WI DNR bacti lab list (includes utility/wastewater labs); homeowner acceptance not stated

Location note

Lab is in IL, certified by Wisconsin (often used as a mail-in lab).

Left blank on the list

The Wisconsin list (version live page) gives no website for this lab.

Certification record

Certificate ID

105 ; 399145010

Issued by

Wisconsin DNR / DATCP (microbiology) (certification program)

List version

Wisconsin DNR - Drinking Water (SDWA) Labs Certified for Coliform Bacteria Testing, version live page

We fetched it

15 Nov 2026 (file SHA-256 db1a5cb9cb67…) · 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*').

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.

• Illinois · IDPH Lab # 17597 · Coliform / E. coli · Public samples: ask the lab
  Illinois Department of Public Health - Certified Water Microbiology Laboratories (Revision Date Thursday, December 4, 2025)

Nearest labs that take homeowner samples

No other lab that takes homeowner samples is within 25 miles of this lab; the nearest is 37 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: Winnebago County, IL

• Private wells: about 39,983 people, 14% of Winnebago County’s 287,078 residents (USGS, 2015); rank 7 of 102 counties in Illinois by people on wells.

• EPA radon zone (indoor air): Zone 1: highest potential (average indoor radon may be greater than 4 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 1,043 private-well users (95% range 888 to 1,231; 2010 base), rank 20 of 102 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 63% of 125,002 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; 1 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 Wisconsin 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).