no clue where you live, but here in texas we have a wonderful( though antiquated feeling) database of all PWS systems complete with violation histories... sample collection dates, test results etc.
http://dww2.tceq.texas.gov/DWW/
i suggest you look up your particular public water system... i think you will find that your chlorine disinfection residuals are far below what you think they are.
you could also commission your own chlorine residual test from an NLEAP accredited laboratory... the results of which could be forwarded to the state and an out of cycle site inspection could be triggered.
again lol... i LITERALLY design small ground water treatment and waste water treatment systems( among other things) for a living.
im working on an RO system engineering report right now.
running a plant is not hard. and managing chlorine disinfection residuals are trivial.
the state usually forces you to keep regular logs related to chemical usage, equipment replacement etc. any radical increase in chlorine consumption would reflected in these logs.
there is 0 reason to agressivly chlorinate clean water traveling through a cold dark pipe... you only need a tiny amount of chlorine to keep the water clean.
treating effluent from a waste water treatment plant? whole different ball game... the clarified effluent is still turbid and has a low BOD meaning it contains suspended solids and some amount of organic material.
its also full of phosphates and nitrates or ammonia depending on how the plant is operated.
this is "dirty" water. it contains alot of oxidizable shit and food for growing organisms so you need a much higher chlorination dose and contact time to effect disinfection with reasonable reliability.
