Description
Operate and monitor chlorination systems to disinfect water, wastewater, or process streams. Control chlorine gas or hypochlorite feed equipment to maintain target residuals and regulatory compliance while ensuring safe handling of cylinders, injectors, and scrubbers.
- • Adjust feed setpoints, vacuum/pressure regulators, injector water flow, and pacing to maintain target chlorine residuals and CT.
- • Monitor residual analyzers, ORP/pH sensors, flowmeters, cylinder scales, and SCADA trends and alarms to ensure specified conditions.
- • Start up, control, and shut down chlorinators, hypochlorite metering pumps, evaporators, injectors, and contact basins.
- • Follow chlorine handling, PPE, and respiratory protection protocols; apply lockout/tagout as required.
- • Exchange and secure chlorine cylinders or ton containers with hoists and scales per Chlorine Institute practices.
- • Inspect chlorination rooms, equipment, valves, and tubing to detect leaks or malfunctions; secure systems if needed.
- • Patrol process areas to check for leaks, corrosion, abnormal odors, or detector alarms; verify ventilation and scrubber status.
- • Collect grab samples at prescribed locations and stages for free/total chlorine, chloramines, pH, and temperature testing.
- • Perform DPD colorimetric tests or use handheld meters; compare to online analyzer readings and adjust dosing accordingly.
- • Record operational data such as residuals, feed rates, flows, temperatures, pressures, cylinder weights, CT values, and test results.
- • Notify maintenance or engineering of equipment failures, analyzer drift, or detected leaks; create work orders.
- • Add or adjust dechlorination chemicals, such as sodium bisulfite or sulfur dioxide, to meet discharge limits when required.
- • Open and close valves and start or stop vacuum regulators, injectors, eductors, blowers, and chemical feed pumps.
- • Review permits, SOPs, and disinfection plans to determine targets, breakpoint or chloramine strategies, and procedural changes.
- • Flush and clean feed lines, injectors, sample lines, and contact tanks; rinse and neutralize per procedure.
- • Perform minor maintenance and calibrations on analyzers, feed pumps, vacuum regulators, rotameters, and scales.
- • Clean and descale injectors and strainers; replace gaskets, yokes, and tubing as needed.
- • Compare field observations and DPD colors to instrumentation and lab results; reconcile discrepancies.
- • Initiate chlorine emergency response: isolate leaks, activate scrubbers, don SCBA, and evacuate or notify per plan.
- • Forecast chemical demand and schedule cylinder or bulk chemical deliveries based on flow and seasonal factors.
- • Maintain inventory of chlorine or hypochlorite, dechlorination agents, test reagents, and PPE; receive and document shipments.
- • Lead or assist crews during cylinder change-outs, leak drills, and unloading; provide task briefings.
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Tasks & skills:
O*NET occupational data (work activities, skills, knowledge).
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This site includes information from O*NET by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under the CC BY 4.0 license. Career Clutch has modified some of this information for student readability. USDOL/ETA has not approved, endorsed, or tested these modifications. O*NET® is a trademark of USDOL/ETA.
Last reviewed: Jan 2026
