More than 1.3 million people across over 200 counties in Texas still had issues with their water supply by Wednesday (Feb 24), but that was down sharply from recent days, a spokesman for the Texas Commission on Environmental Quality (TCEQ) said.
That figure compared with Tuesday's 3.4 million, Monday's 8 million and Sunday's 9 million, or about a third of the state's population.
A deadly winter storm caused widespread blackouts last week across Texas, a state unaccustomed to extreme cold, killing at least two dozen people and knocking out power to more than 4 million at its peak.
As of Wednesday evening, "33 Public Water Systems are non-operational, affecting 20,689 Texans," the spokesman told Reuters in an emailed statement, adding that 204 counties were reporting issues with their public water systems.
He said around 853 public water systems were on a "boil water notice", meaning people were being advised to boil water before consuming it, affecting 1.3 million Texans. Some 1,176 previously issued boil water notices had been rescinded, he added.
Once the current crisis is over, TCEQ plans to examine the ongoing experience to prevent such a disruption from taking place in the future, TCEQ Executive Director Toby Baker told Reuters on Wednesday.
Texas Governor Greg Abbott pledged on Wednesday to overhaul the state's electric grid operator after a massive blackout left residents without heat, power or water for days.
Six ERCOT directors have resigned and a board nominee declined a seat in the wake of sharp criticism of the group's performance.