ID Water/WW Operator study guide
ID Water/WW Operator · Work through your exam, one topic at a time.
The Idaho Water and Wastewater Operator certification is administered within the Idaho Department of Environmental Quality's water program, which the department's own site navigation splits into a Drinking Water section and a Wastewater section. Candidates typically pursue the credential to demonstrate competence operating public drinking water treatment and distribution systems or wastewater treatment and collection systems in Idaho. Because the official certification pages could not be retrieved when this profile was assembled, this page describes the two program areas the source confirms and deliberately omits question counts, time limits, passing scores, fees, retake rules, and validity periods rather than guessing at them. Expect exam content to be organized around the two areas: drinking water treatment and distribution on one side, and wastewater treatment and collections on the other. Topics on this exam: Drinking Water Treatment and Distribution and Wastewater Treatment and Collections. The ID Water/WW Operator study guide has 2 sections and about 711 words.
01Drinking Water Treatment and Distribution
The Drinking Water Treatment and Distribution domain tests the operator's ability to run a conventional surface-water plant and protect quality after the water leaves it. Expect questions on coagulation and flocculation (jar tests, alum dose, pH adjustment), sedimentation, granular media filtration, free chlorine or chloramine disinfection, CT, turbidity, distribution hydraulics, cross-connection control, and monitoring under the Surface Water Treatment Rule and Stage 2 DBPR. Combined filter effluent turbidity: ≤0.3 NTU in at least 95% of monthly samples and never 1 NTU. Free chlorine residual in distribution: detectable at ≥0.2 mg/L, maintained throughout the system.
341 words, about 2 min02Wastewater Treatment and Collections
The Wastewater Treatment and Collections domain tests both sides of the system: getting sewage to the plant and treating it to permit limits. Expect questions on preliminary treatment, primary clarification, activated sludge process control (F/M, MCRT, SVI, dissolved oxygen, RAS/WAS), secondary clarification, disinfection, NPDES reporting, collection system hydraulics, lift stations, infiltration/inflow, and SSO prevention. Primary clarifiers remove settleable solids; typical BOD removal is 25–40% and TSS removal 50–70%. F/M = (Q × BOD × 8.34) / (V × MLSS × 8.34).
370 words, about 2 min