HOUSTON – The entire city of Houston has been placed under a boil water notice, effective immediately, city officials announced Sunday.

According to Houston Public Works, the notice was issued after the pressure from the city’s main water system dropped below the Texas Commission on Environmental Quality’s required minimum of 20 PSI during a power outage at the East Water Purification Plant on Nov. 27 at 10:30 a.m.

Officials have not announced an expected timeframe on when the notice will be lifted.

Out of an abundance of caution, the city of Bellaire also issued a water boil notice late Sunday night.

Additionally, Houston Independent School District has canceled all operations for Monday due to this issue.

As a result of the Boil Water Notice, the public is advised:

*Do not drink the water without boiling it first.

*Bring all water to a boil for at least two minutes.

*Let it cool before using.

*Individuals without power to boil water are advised to use bottled water for consumption.

According to TCEQ, children, seniors, and persons with weakened immune systems are particularly vulnerable to harmful bacteria, and all customers should follow the precautions detailed above.

KPRC 2 is investigating the City of Houston water department. We told you earlier this month that more customers reported problems with low water pressure than in any other major metropolitan water district surveyed by JD Power last year.