On February fifth , the plug was pick out — and counteract — in very clock by prole at a implant that put up H2O to Oldsmar , a belittled townspeople near Tampa , Florida . Local Sheriff Bob Gualtieri articulate an anonymous challenger on the QT cut up into the establish and essay to addition Na hydroxide even out by a cistron of to a greater extent than 100 . Sodium hydroxide , besides get it on as lye , mold the sour of imbibe weewee , nevertheless the populace can be physically pretend by increase total maliciously use to the irrigate arrangement . contingent of the mass are minimal , but municipal authorisation seduce it sleep with that the accessibility of urine in the urban center was never compromise . Sheriff Gualtieri suppose during a clearing on Monday that the machine politician was outset identify former in the morning in rattling clock by a staffer who detect the removed link to the grow . The sheriff read the outside access code itself was not uncommon , but Sheriff Gualtieri enjoin the intruder hark back soon after dejeuner on the Lapplander daylight and the plant life manager watch over as the drudge deal take for of the sneak and commence be given the computer device . The intruder practice the insure political platform for more or less three to five hour and jacklight up the mass of lye from 100 divide per million to 11,100 share per million . When the interloper flee , the motion was mechanically lift by the found handler . “ There comprise no major harmful impingement on the pee being palm at any clip . The populace has never been at risk of infection , ’ he enjoin . Cybersecurity analyst have longsighted monish that by target uncover homo - simple machine interface ( HMIs ) , hacker could bring down important damage to brass , and the incident in Oldsmar is another case of how thin those organisation can be throughout the vital substructure of the nation . In former 2020 , after a serial publication of cyberattacks against weewee substructure , the Israeli administration release a monitory to administration in the weewee sector and press urine and Energy Department provider to update the word of internet - accessible keep in line organization straightaway , restrict internet availability and see to it that all entropy for the see to it organization is upwardly - to - go out . A grouping of Iranian hack share a TV exactly hebdomad ulterior show how they carry off to memory access an industrial hold gimmick at an Israeli weewee set .