Performance of electro/UV/sulfite process in natural water matrices. Electro/UV/sulfite process was used to treat (a) ibuprofen, (b) salicylic acid, (c) bisphenol A, and (d) E. coli, accompanied with automatic adjustments of (e) dissolved oxygen and (f) solution pH. Conditions: 1 mM sulfite, 200 mA, UV. 5 μM ibuprofen, salicylic acid, and bisphenol A were used as micropollutants; 106 CFU/mL E. coli cell in exponential-phase was used as model pathogen. Note: MIT groundwater, Pozo mita groundwater in our Superfund site in Puerto Rico; JAM surface water, Jamaica pond in local Boston, MA.