Water & Wastewater Operator Certification in Illinois

Your path to certified in Illinois

1. Both certificates come from Illinois EPA, but not from the same desk. Community water supply operators go through the Bureau of Water under 35 IAC Part 681. Wastewater operators go through the Division of Water Pollution Control under Part 380. Different forms, different exam calendars, different fee rules. (Non-community wells answer to the Illinois Department of Public Health instead.)
2. The water side charges, modestly. Mail the exam request with a $10 check per attempt and you get a Letter of Admission. Sittings run monthly in Des Plaines, Springfield, Marion, and Rockford, every other month in Champaign, plus IRWA's conferences. Four attempts per year per level is the cap.
3. The wastewater side is free. All of it. No exam fee, no certificate fee, no renewal fee, "at the present time" as the FAQ puts it. Get the request in at least 30 days ahead; seats are first come, first served.
4. Check which way the ladder runs. Wastewater numbering is upside down compared to most states: Class 4 is the entry rung (lagoons), Class 1 is the big mechanical plants. Water classes A through D go by treatment complexity, and Class D (distribution, storage, pumpage) needs just 890 hours.
5. Renew on the July clock. Every certificate expires three years from July 1 of its issue year. Water costs $10 plus 30 or 15 pre-approved hours by class; wastewater needs the hours and nothing else.

Illinois writes and grades its own exams, 70 to pass. The math is the same on both sides of the building, so drill it once in the free practice tool and carry it to either test.

Drinking water: Illinois EPA, Bureau of Water (community water supply operators) program page

Who runs certification here

One agency, two programs that barely share paperwork. The Bureau of Water certifies community water supply operators under the Public Water Supply Operations Act (415 ILCS 45) and 35 IAC Part 681. The Division of Water Pollution Control certifies wastewater operators under 35 IAC Part 380. Each keeps its own FAQs, forms, and schedule pages, and the fee postures could not be more different. One shared convenience: the public operator lookup covers both sides. A system may also hire a contract operator instead of employing one, but the signed contract must reach Illinois EPA within 7 days.

The grades and what they cover

Drinking water classes follow what the plant does, not how many people drink from it. Class A covers the heavy treatment: coagulation, lime softening, membranes, UV. Class B is aeration plus filtration and ion exchange, Class C is chemical feed only, and Class D is pumpage, storage, or distribution with no treatment at all. Class D's 890-hour experience bar (about six months full time) makes it the small-system door. Pass the exam before you have the hours and you hold Operator in Training status for up to six years.

Wastewater climbs the other direction: Class 4 operators run lagoons, Class 3 adds fixed-film plants and all primary treatment, Class 2 covers activated sludge under 1 MGD, and Class 1 takes everything at or above it. Industrial plants use Class K (locked to one facility; change plants and you retest) or Class R for groundwater remediation. Collection system certification exists too: voluntary statewide, occasionally required by a permit, no expiration, no training hours.

The exam: logistics, not cramming

No PSI, no Prometric. Illinois EPA writes its own exams, validates them with expert panels, and proctors them at its own offices. Water exams run 9 a.m. to 2 p.m.; reserve your seat with the testing office about a week out, bring the Letter of Admission and photo ID, and leave the phone in the truck. The 2026 schedule lists every site and date.

Wastewater exams run 9 a.m. to noon, 100 questions, up to 3 hours, one exam per sitting, with the schedule covering five sites including ERTC at SIU Edwardsville. Results arrive by mail in about 30 days. Fail and there is no waiting period: send a new request and sit again. Both sides cut off at 70 percent.

Curious what those hundred questions actually cover? The what's on the exam guide walks the blueprint.

Keeping it current (renewal)

Everything expires on a three-year cycle anchored to July 1. Water: $10 plus training, 30 hours for Class A or B and 15 for C or D, at least two thirds technical, from IL EPA pre-approved courses only, with no carryover between cycles. You keep your own attendance proof, and audits are real: fail to produce it and the certificate is on the line. File late with the hours done and it costs $20 within two years; finish the hours late and the certificate sits invalid until you do.

Wastewater: the same three-year rhythm, 30 hours for Class 1 and 2 (at least 20 technical) or 15 for Class 3 and 4, and no renewal fee. Class K and R certificates work differently: five years, then a fresh exam rather than a renewal. Collection certs never expire.

Training and continuing education

The state-designated training center is ERTC at SIU Edwardsville, which runs a one-year pre-service certificate program and doubles as a wastewater exam site; the training page lists approved providers. Illinois Rural Water Association keeps an IL EPA-approved course calendar, hosts drinking water exams at its Effingham and Springfield conferences, and runs an earn-while-you-learn apprenticeship on the national rural water model. Illinois Section AWWA adds operator education on the water side. Remember the renewal rule: for drinking water hours, only pre-approved courses with an IL EPA course ID count.

Reciprocity

Moving in with a license? The water side takes a Reciprocity Certification application (the form was refreshed April 2025) from the forms page, and the reciprocal certificate costs all of $10. Wastewater reciprocity is free and judged case by case against your home state's rules, via the request form on the wastewater forms page. Four credentials cannot cross state lines at all: Class K, Class R, operator in training, and collection system certificates.

Where to get help (small systems)

• Illinois Rural Water Association, ilrwa.org: training calendar, technical assistance, the apprenticeship, and conference exam sittings.
• ERTC at SIU Edwardsville: the state's designated operator training center, including pre-service study before your first exam.
• Illinois EPA's operator lookup verifies any operator or facility on either side.
• Illinois Section AWWA, isawwa.org: water-side education and the state's mutual aid network.

Running a system in Illinois

What managers and boards actually need to know about who regulates what and where the money comes from.

Rate regulation. The Illinois Commerce Commission rate-regulates only six investor-owned water utilities (Illinois American and Aqua Illinois are the big two). Municipally owned systems set their own rates through local government, no ICC filing involved.

Funding. Illinois EPA runs both revolving funds from one SRF page: the Public Water Supply Loan Program for drinking water and the Water Pollution Control Loan Program for wastewater and stormwater, plus a dedicated lead service line replacement loan track. Current-year rates run 2.16 percent base, 1.62 for small communities, and 1.00 for hardship cases.

Mutual aid. ILWARN, administered by the Illinois Section AWWA, is the statewide utilities-helping-utilities agreement. One signature, no cost, and your storm response gets a deeper bench.