How much do water treatment operators make in the UK? Two researched Thames Water adverts from 2026 provide specific examples rather than a national average. A Chieveley Process Technician vacancy advertised a salary from £29,349 for 38 hours a week, with separate standby payments and overtime opportunities after training. A Shalford Process Controller (Water) vacancy offered up to £33,000 for 38 hours a week with a standby rota. Both adverts were closed when checked on 3 October 2026. The National Careers Service describes apprenticeship, trainee and direct-application routes, along with tasks such as monitoring equipment, sampling, maintaining machinery and keeping accurate records. Its changing opportunity listings included a Water Technician Apprenticeship advertising £15,600 to £24,784.50 a year. These examples are not guaranteed pay ranges. Applicants should compare confirmed basic salary, contracted hours, shift and standby terms, variable overtime, pensions, leave and training. Progression can involve team leadership or further technical qualifications, but there is no automatic salary increase. The full article explains hourly comparisons, total earnings and questions to ask before accepting an offer.