Water Online published a guest column by Alex Towfigh, AquaMesh's founder and CEO, on 26 October 2026. The full piece is on the Water Online site: The $1.5 Million Sewer Repair — And The Water-Quality Evidence Missing Upstream.
What follows is a short summary.
The argument in brief
The case. A California wire manufacturer was ordered to pay $1.5 million in restitution after acidic wastewater damaged a public trunk sewer. EPA's 2010 announcement described 14 illegal discharges over four months of 2008, with pH as low as 1 against a permit minimum of 6. The column is careful about what this shows: the restitution covered cumulative damage, and a new analyzer alone would not necessarily have stopped the discharges. Its question is whether the plant could have recognized a repeated pattern early enough to investigate the treatment system behind it.
An endpoint is not an explanation. A pH probe at the discharge point tells you whether neutralization worked. It does not tell you whether the cause was a transfer, a dosing fault, a bypass, a reagent shortage or maintenance. Better detection cannot replace working treatment equipment, but it can shorten the path from a suspect reading to its cause.
Two bills for the same discharge. Lost product and treatment surcharges are separate ledgers, and the column warns against counting the same saving twice. It works through a dairy scenario using a published loss range of 1% to 3% of milk processed, and a COD example using San Diego's published January 2026 rate of $0.27 per pound: at 1 million gallons a day with 1,000 mg/L of added COD, about $2,252 a day. Both are sensitivity calculations, not measured losses or billing forecasts, and the column says so.
The blind spot between systems. Read-only access to PLC, SCADA and historian data reconstructs what production was doing and when. A multiwavelength UV/visible sensor can show changes in the stream that pH, flow or conductivity miss, provided it is calibrated on site. A rinse that lines up with an optical change is a lead to check against a lab sample, not a finding.
The clock decides usefulness. Detection only helps if it arrives in time to act. EPA event-detection research found that many unexpected water-quality changes came from operational changes or sensor problems rather than contamination. So the measures that matter are lead time, confirmed causes, false alerts per shift and cost, not anomaly accuracy on its own.
Three questions for the next operations meeting
For each recurring discharge, the column asks:
- What is the earliest validated water-quality measurement?
- Which upstream records would explain it?
- What authorized operating change would prevent it from happening again?
It closes with a test of its own: find the single missing measurement that would most improve the conclusion. If there isn't one, more sensors may not be the right investment. And AquaMesh's value has to be shown the same way, through lower confirmed losses, earlier diagnosis or less investigation effort.