Case Studies
How water and wastewater utilities in the U.S. and UK have deployed the Halogen MP5 to reduce maintenance, eliminate waste streams, and gain continuous real-time water quality visibility. Each study keeps the model named in the original account; the current model is the MP-5F.
City of Whittier, CA
From one trial to four booster stations: Whittier reports more than two years of MP5 experience, no calibrations since installation, and reagent-free chlorine monitoring that keeps operator visits short.
- check_circleFour booster-station installations, with no calibrations reported since each installation; operators continue Monday reference checks.
- check_circleThe largest reported offset at the challenging sleeved-pipe installation was 0.04 ppm.
- check_circleNo monthly reagent or buffer change-outs. Wear-part alerts help the team plan routine service.
David Ramirez, City of Whittier. Customer-reported experience as of October 2026.
County of Maui, HI
Maui describes MP5 groundwater monitoring at a remote site with low and variable sample pressure. Following the June 2024 pilot, the unit became a permanent part of operations.
- check_circleThe source reports startup without significant calibration or flow adjustments.
- check_circleCalibration intervals were minimal, with months between calibrations.
- check_circleThe pilot converted to permanent operation; additional remote sites were planned.
Source context: Historical customer account beginning in June 2024. The source does not establish zero calibration continuously from installation to today. Current model: MP-5F.
Newport News Waterworks, VA
The Harwood's Mill evaluation compared the MP5 with a Hach CL17 and grab samples. The operations team reported stable readings and reduced maintenance checks during the evaluation.
- check_circleReadings matched grab samples and were within 0.2 mg/L of the CL17 readings.
- check_circleWeekly checks reduced to monthly, with no direct sensor maintenance reported during testing.
- check_circleThe MP5 took over online SCADA monitoring after the CL17 failed at six weeks.
Source context: 2025 source report. Performance is specific to the evaluation; its fleet-wide savings figures are projections, not realized savings. Current model: MP-5F.
Orange County Utilities, FL
Orange County tested MP5 sensors with cellular monitoring across three treatment processes. Staff reported that trips for daily or weekly grab samples were largely eliminated, while periodic calibration checks continued.
- check_circleFive sensors were described in the source account.
- check_circleData was collected every minute and transmitted every two hours.
- check_circleThe source estimates 2,080 man-hours saved annually across five sensors.
Source context: Historical pilot account beginning in 2021. Labor savings are the utility's estimate; periodic verification and site-specific power maintenance remained necessary. Current model: MP-5F.
Iron Bridge Regional Water Reclamation Facility, FL
Iron Bridge evaluated the historical MP5T in a parallel loop alongside its existing sensor array. The source reports no calibration or maintenance during the initial three months of reclaimed-water testing.
- check_circleExisting sensors required calibration once per shift: three times per day.
- check_circleNo calibration or maintenance was reported for the MP5T in the initial three-month evaluation.
- check_circleThe report describes pH, conductivity, temperature and ORP comparisons with discrete sensors.
Source context: 2021 source account, using the MP5T model name. This result is limited to the initial three months. The cited 3,800 hours/year describes estimated upkeep for seven existing sensors, not measured MP5 savings. The PDF does not document a Florida DEP submission or approval.
Palm Beach County Water Utilities, FL
Instrumentation technician Vinny Guiel describes three MP5 units across water and wastewater facilities, reporting reliability, reagent-free operation and easier maintenance.
- check_circleThe oldest unit was two years old with no issues reported at the time of the testimonial.
- check_circleOne unit required about three calibrations over two years.
- check_circleThe operator reported replacing annual chlorine maintenance items in under 15 minutes.
Source context: Historical operator testimonial, not a current fleet-status update. County-wide expansion beyond 50 units was a future expectation, not a completed rollout. Current model: MP-5F.
City of Lakewood, CA
Lakewood evaluated a flow-cell MP5 alongside a Hach CL17 and later installed a wet-tap sensor at a well. The wet-tap installation alerted operators to a low chlorine residual and enabled a response.
- check_circleThe six-month pilot required no calibration, with minor maintenance for manganese buildup.
- check_circleThe source reports readings within 0.04 ppm of the Hach CL17 in the pilot.
- check_circleWet-tap installation followed pressure-related design adjustments and provided early warning at the well.
Source context: Historical account beginning with the 2021 pilot. The 69,000 gallons/year figure describes potential waste from traditional analyzers, not a measured savings result for every MP5 installation. Current model: MP-5F.
Compton Durville, Wessex Water, UK
The Compton Durville report evaluates MP5 monitoring in high-iron borehole water and investigates fouling of the incumbent chlorine sensor. The MP5 was used for independent monitoring, not dosing control.
- check_circleThe report describes five months with no MP5 calibration or maintenance intervention.
- check_circleIts data analysis covers 73 operational cycles in a stated 65-day dataset.
- check_circleThe report interprets rising chlorine residuals as evidence consistent with fouling-related dosing compensation.
Source context: Evaluation report for an October 2025 installation. The reported 10.67% figure is a start-to-end residual change; it is not a directly measured chemical-savings percentage. The report includes a subsequent wipe inspection. Current model: MP-5F.
Sensus AMI Integration, Gainesville, GA
The Gainesville account describes continuous chlorine monitoring using Halogen sensors connected through the Sensus FlexNet network, supporting distribution-system visibility and demand-based flushing.
- check_circleHalogen sensor measurements connect through compatible Sensus gateway hardware.
- check_circleThe existing online white paper describes Gainesville's remote flushing integration.
- check_circleSensor measurement frequency and AMI reporting intervals are separate settings.
Source context: Existing online Gainesville white paper and Sensus integration material. No standalone Gainesville success-story PDF was located; the OMNI PDF is an installation drawing, not a case-study report. Current model: MP-5F.
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