Wastewater operator continuing education
Infiltration or Inflow: Telling Them Apart
Approved for renewal credit in IllinoisGroundwater leaking in and stormwater pouring in look alike at the plant, but they behave differently and have different fixes. This hour shows how to tell them apart on your flow record and what each means at the headworks.
Course summary, as it appears on your certificate
To enable wastewater treatment operators to accurately distinguish between infiltration and inflow in wet weather conditions, understand their different impacts and remedies, interpret flow hydrographs correctly, and apply practical decision-making at the headworks to optimize plant operation and compliance.
Level 1 — what it is and why — the foundations, for operators new to the subject or wanting a refresher
Credit awarded: 1 hour — Technical
The Illinois course number is issued by the Agency for this course and is printed on your certificate.
Reviewed by: Robert Risley, Class 1 Wastewater Operator — reviewed October 2026
AquaCert does not mark its own homework: a licensed operator reviews the content and the course cannot be sold while that review is out of date.
One hour of study is one hour of credit. Your certificate reports the hours, which is what Illinois records against your renewal.
What's included
- Self-paced online coursework you can start, pause, and resume anytime
- Short questions along the way, and a short final quiz to pass for your certificate (retake it as often as you need)
- An official certificate of completion (PDF) with a public verification code
- Progress saved to your My Learning dashboard
One-time payment · lifetime access to this course
About 72 minutes of video · 1 hour
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Full refund within 7 days if you have not completed the course — refund policy.
Training a team? Buy seats for your operators — card or purchase order, with a completion record you can export.
Can your plant pay? See how, with a request to print for your supervisor.