Public health officials in Mandera county have declared 13 wells unsafe and contaminated.
Only one well is operational.
The officials said the shallow wells are likely to have been contaminated by surface runoff following heavy rain that has pounded the region over the past month.
“We…have written to all hotel owners and done public sensitisation to prevent a repeat of 2016, when a cholera outbreak claimed lives in this region,” he said.
Some 894 cholera cases were reported in Mandera East in April 2016 alone and 20 people died Yussuf said well owners have not put up water treatment tanks.
He said the department has enough chlorine and water vendors have no excuse for selling untreated water to consumers.
Yussuf said only three well owners have complied with hygiene rules, which include having a toilet and water treatment tanks.
The deadline lapsed on Tuesday.
Health campaign Water scarcity in Mandera has led to private individuals transporting water by donkey carts and water bowsers.
Nema officer Fatuma Maalim said Mandera lacks a liquid waste treatment plant.