70 Certified Water Testing Labs in Illinois

70 laboratories from Illinois Environmental Protection Agency (chemistry) and Illinois Department of Public Health (microbiology)'s certified-laboratory list, 59 of them located in Illinois. Compare the ones near you on phone number, certificate number and certified scope before you send a sample.

59 certified laboratories located in Illinois

Across 55 cities. Closest is usually cheapest: most labs need the sample within 24-30 hours of collection, and courier or overnight shipping is billed on top of the test.

Arlington Heights, Illinois (1)

Arlington Heights Public Works

222 N. Ridge Ave.
Arlington Heights, IL 60005

(847) 368-5800

Certificate 17601

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Aurora, Illinois (1)

Aurora Water Treatment Plant 24 P/A

1111 Aurora Avenue
Aurora, IL 60505

(630) 256-3250

Certificate 17513

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Carbondale, Illinois (1)

Carbondale Central Lab Quanti

2401 S. McLafferty Rd
Carbondale, IL 62901

(618) 457-8613

Certificate 17502

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Centralia, Illinois (1)

Precision Water Lab Co

1705 State Route 161 ref.elementag@gmail.com
Centralia, IL 62801

Phone number not published in the state directory

Certificate 17600

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Champaign, Illinois (1)

Illinois American Water

1609 North Mattis Ave.
Champaign, IL 61821

(217) 377-4764

Certificate 17505

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Charleston, Illinois (1)

Charleston Water Lab

2600 E. McKinley Ave c/o 520 Jackson Ave.
Charleston, IL 61920

(217) 345-2977

Certificate 17575

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Chicago, Illinois (1)

Chicago Department of Water Colisu

1000 E. Ohio St.
Chicago, IL 60611

(312) 744-3738

Certificate 17506

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Cicero, Illinois (1)

Metropolitan Water Reclamation District Coli

6001 W. Pershing Rd.
Cicero, IL 60804

Phone number not published in the state directory

Certificate 17508

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Collinsville, Illinois (1)

Teklab, Inc.

5445 Horseshoe Lake Road
Collinsville, IL 62234

(618) 344-1004

Certificate 17584

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Danville, Illinois (1)

Aqua Illinois, Inc.

1300 W. Fairchild St.
Danville, IL 61834

(217) 443-8541

Certificate 17510

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Decatur, Illinois (1)

Decatur Water Department

1155 S. Martin Luther King Dr. c/o #1 Anderson Pla
Decatur, IL 62521

(217) 424-2874

Certificate 17512

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

DeKalb, Illinois (1)

DeKalb Water Department

1216 E. Market St. c/o 200 S. Fourth St.
DeKalb, IL 60115

(815) 748-2050

Certificate 17542

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Dieterich, Illinois (1)

Water Lab (EJ Water Coop)

108 South Main Street
Dieterich, IL 62424

(217) 925-5566

Certificate 17602

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Dixon, Illinois (1)

Dixon Water Department

92 Artesian Place
Dixon, IL 61021

(815) 284-3060

Certificate 17582

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

E Moline, Illinois (1)

E. Moline Water Department

9th St. & 12th Ave. c/o 915 Sixteenth Ave.
E Moline, IL 61244

(309) 752-1519

Certificate 17543

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

E. St. Louis, Illinois (1)

Illinois American Water

800 N. Front St.
E. St. Louis, IL 62201

(618) 250-8723

Certificate 17515

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Elgin, Illinois (1)

Elgin Water Department

375 W. River Rd. c/o 150 Dexter Court
Elgin, IL 60120

(847) 931-6100

Certificate 17517

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Evanston, Illinois (1)

Evanston Water & Sewer Division

555 Lincoln Street
Evanston, IL 60201

(847) 866-2942

Certificate 17514

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Freeport, Illinois (1)

Freeport Department of Public Works

337 S. Hancock Ave.
Freeport, IL 61032

(815) 232-6017

Certificate 17519

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Galesburg, Illinois (1)

Galesburg Laboratory

920 W. Main St. P.O.Box 1387
Galesburg, IL 61401

(309) 345-3645

Certificate 17520

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Geneva, Illinois (1)

Suburban Laboratories, Inc.

1950 S. Batavia Ave.
Geneva, IL 60134

Phone number not published in the state directory

Certificate 17585

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Glencoe, Illinois (1)

Glencoe Water Department

49 E. Park Ave. c/o 675 Village Court
Glencoe, IL 60022

(847) 835-4111

Certificate 17550

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Gurnee, Illinois (1)

North Shore Water Reclamation District Quan

14770 W. Wm. Koepsel Drive P.O. Box 750
Gurnee, IL 60031

(847) 623-6060

Certificate 17534

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Harrisburg, Illinois (1)

BAR Laboratory / Brown & Roberts, Inc.

1 West Ridge Road
Harrisburg, IL 62946

(618) 252-8111

Certificate 17605

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Herscher, Illinois (1)

Herscher Public Works

644 Park Rd. c/o 272 E. second St.
Herscher, IL 60941

(815) 426-2131

Certificate 17607

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Highland Park, Illinois (1)

Highland Park Water Department

E. Park Ave. at Lake Michigan c/o 1707 St. Johns A
Highland Park, IL 60035

(847) 433-4355

Certificate 17525

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Hudson, Illinois (1)

Bloomington Water Department

25515 Waterside Way
Hudson, IL 61748

(309) 434-2153

Certificate 17576

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Joliet, Illinois (2)

Joliet Sewage Treatment

1021 McKinley Ave.
Joliet, IL 60436

(815) 724-3675

Certificate 17523

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Will County Health Department

501 Ella Ave.
Joliet, IL 60433

(815) 727-8517

Certificate 17524

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Kankakee, Illinois (1)

Aqua Illinois, Inc.

1100 Cobb Blvd.
Kankakee, IL 60901

(815) 935-6531

Certificate 17549

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Lake Bluff, Illinois (1)

Central Lake County J. A. W. A. Colile

200 Rockland Rd.
Lake Bluff, IL 60044

Phone number not published in the state directory

Certificate 17540

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Lebanon, Illinois (1)

O'Fallon Water Laboratory

10378 Rieder Rd
Lebanon, IL 62254

(618) 537-4930

Certificate 17503

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Libertyville, Illinois (1)

Lake County Environmental Laboratory 18 Quantitr

Quantitray, 500 W. Winchester Road #103
Libertyville, IL 60048

Phone number not published in the state directory

Certificate 17541

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Mattoon, Illinois (1)

Mattoon Water Department

2941 Lake Rd. P.O. Box 99
Mattoon, IL 61938

(217) 234-2454

Certificate 17558

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

McHenry, Illinois (1)

Pace Analytical Services, LLC - McHenry Co

4314 W Crystal Lake Rd A
McHenry, IL 60050

Phone number not published in the state directory

Certificate 17556

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Moline, Illinois (1)

Moline Water Department

30 18th St.
Moline, IL 61265

(309) 524-2309

Certificate 17567

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Monticello, Illinois (1)

Key Laboratory Services, Inc.

453 west Monroe St.
Monticello, IL 61856

(217) 875-2691

Certificate 17583

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Naperville, Illinois (2)

Eurofins Built Environment Testing Central-Chicago

1815 W. Deihl Road Suite 800
Naperville, IL 60563

(331) 330-2066

Certificate 17606

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Naperville Water & Reclamation Simp

3712 Plainfield-Naperville Rd P.O. Box 3020
Naperville, IL 60566

(630) 420-6128

Certificate 17566

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Normal, Illinois (1)

Normal Water Department

107 E. Mulberry St. c/o 100 E. Phoenix St.
Normal, IL 61761

(309) 454-9657

Certificate 17577

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Peoria, Illinois (3)

Daily Laboratories

2200 W. Altorfer Drive, Suite B
Peoria, IL 61615

(309) 691-4513

Certificate 17133

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Illinois American Water

100 E. Lorentz Ave.
Peoria, IL 61614

(309) 566-4164

Certificate 17528

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Pace Analytical Services, LLC - Peoria 18

2231 W. Altorfer Drive
Peoria, IL 61615

(309) 683-1766

Certificate 17553

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Peru, Illinois (1)

Test, Inc.

2323 4th Street P.O. Box 483
Peru, IL 61354

Phone number not published in the state directory

Certificate 17518

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Quincy, Illinois (1)

Quincy Water Department

110 N. Front St. c/o 730 Maine St., Suite 214
Quincy, IL 62301

(217) 228-4592

Certificate 17529

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Rochelle, Illinois (1)

Rochelle Water Department

888 Treatment Plant Drive
Rochelle, IL 61068

(815) 561-2045

Certificate 17604

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Rock Island, Illinois (1)

Rock Island Water Department

2215 16th Ave.
Rock Island, IL 61201

(309) 732-2315

Certificate 17531

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Rockford, Illinois (1)

Rockford Water Division Environmental Laboratory

1111 Cedar Street
Rockford, IL 61102

(815) 987-5713

Certificate 17597

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Rosemont, Illinois (1)

Culligan Analytical Laboratory

9399 W. Higgins Rd., Suite 1100
Rosemont, IL 60018

(847) 430-1284

Certificate 17598

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Springfield, Illinois (1)

City Water, Light & Power Colile

3100 Stevenson Dr.
Springfield, IL 62703

Phone number not published in the state directory

Certificate 17532

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

St. Charles, Illinois (1)

St. Charles Environmental Laboratory, City of

1405 Devereaux Way c/o 2 E. Main St.
St. Charles, IL 60174

(630) 377-4465

Certificate 17593

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Stockton, Illinois (1)

Lyons Labs

9795 U.S. Rt. 20 E.
Stockton, IL 61085

(815) 947-3360

Certificate 17589

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Warrenville, Illinois (1)

Phigenics Analytical Services Laboratory

3S701 West Avenue
Warrenville, IL 60555

(844) 850-4087

Certificate 17595

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Wheaton, Illinois (1)

DuPage County Health Department

111 N. County Farm Rd.
Wheaton, IL 60187

(630) 221-7177

Certificate 17544

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Willowbrook, Illinois (1)

ETP Labs, Inc.

638 Executive Drive
Willowbrook, IL 60527

(630) 891-3392

Certificate 17134

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Wilmette, Illinois (1)

Wilmette Water Department

200 Lake Ave.
Wilmette, IL 60091

(847) 853-7532

Certificate 17530

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Winnetka, Illinois (1)

Winnetka Water Department

Tower Rd. at Lake Michigan c/o 510 Green Bay Rd.
Winnetka, IL 60093

Phone number not published in the state directory

Certificate 17557

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Woodridge, Illinois (1)

Illinois American Water

1000 Internationale Pkwy.
Woodridge, IL 60517

(630) 739-8846

Certificate 17587

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Woodstock, Illinois (1)

McHenry County Health Department Coli

667 Ware Road
Woodstock, IL 60098

Phone number not published in the state directory

Certificate 17539

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

11 more Illinois-certified laboratories located in another state

Illinois certifies these laboratories, but they are not in Illinois. They mail you a kit and you ship the sample back, so turnaround includes transit both ways.

Quad City Metallurgical Laboratory, Inc.

17048 215th Street
Davenport, IA 52806

(563) 386-7827

Certificate 171984

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

QC Analytical Services, LLC Qua

Qua, 1798 Iowa Drive
Le Claire, IA 52753

Phone number not published in the state directory

Certificate 1718113

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Pace Analytical (former McCoy & McCoy Labs) Col

Col, 11422 S US Hwy 41
Farmersburg, IN 47850

Phone number not published in the state directory

Certificate 17771

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Microbac Laboratories, Inc.

250 West 84th Drive
Merrillville, IN 46410

Phone number not published in the state directory

Certificate 1755266

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Eurofins Eaton Analytical, LLC

110 South Hill St.
South Bend, IN 46617

Phone number not published in the state directory

Certificate 17767

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Utility Services Laboratory Qua

10525 US HWY 30 Bldg 12
Wanatah, IN 46390

(219) 759-0193

Certificate 17772

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

National Testing Laboratories, Ltd.

556 South Mansfield St
Ypsilanti, MI 48197

Phone number not published in the state directory

Certificate 170055

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Pace Analytical Services, LLC - Hazelwood P/A

944 Anglum Road
Hazelwood, MO 63042

(314) 432-0550

Certificate 171050

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

EMSL Analytical

200 RT 130 North
Cinnaminson, NJ 08077

(856) 303-2584

Certificate 1703036

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Nova Biologicals, Inc.

1775 N. Loop 336, East Suite 4
Conroe, TX 77301

(936) 756-5333

Certificate 17591

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Clean Water Testing

1990 Prospect Court
Appleton, WI 54914

(920) 733-7590

Certificate 17490931

Certified scope not published in this list — the lab is certified, but the source does not say for which analytes. Ask before you book.

Listed in epa.illinois.gov, read 2026-09-20

Where this list comes from

Read on 2026-09-20 from 1 document published by Illinois Environmental Protection Agency (chemistry) and Illinois Department of Public Health (microbiology). This page lists what those documents list — not necessarily every laboratory Illinois certifies — so check the official directory below before you rely on it.

idph-certified-water-microbiological-12-4-25.pdf (70 laboratories)

How Illinois publishes it: PDF lists—chemistry certifications through IEPA, microbiology through IDPH

Access Illinois Lab Directory

State Certification Program

Illinois Environmental Protection Agency (chemistry) and Illinois Department of Public Health (microbiology)

Visit Certification Program Website

💡 Local Resources & Tips

Illinois splits certification between two agencies; ensure your lab holds appropriate certifications for all parameters you need

How to choose one of these labs

1.Shortlist two or three: start with the labs in your own city above, because most drinking-water samples must reach the lab within 24-30 hours of collection
2.Verify certifications: confirm the lab holds current state certification for the specific contaminants you want to test (bacteria, nitrate, metals, VOCs, PFAS). Certification is per-analyte, and a certificate number on this page is a starting point, not a guarantee it is still current
3.Request pricing: call multiple labs to compare prices and turnaround times—costs vary significantly even within the same state
4.Schedule testing: follow lab instructions for sample collection, storage, and delivery
5.Review results: compare detected concentrations against EPA standards and take appropriate action

Got a water test back? Get a free reading of every number

Upload your tap water report (PDF or a photo) and we'll email you a plain-English explanation of each contaminant and level — free. Educational only, no medical claims.

Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.

Upload my test