UPDATE: The boil order was lifted Sunday afternoon.

ST. LOUIS COUNTY (KMOV.com) -- Missouri American Water issued a precautionary boil advisory for a portion of St. Louis County Saturday afternoon. 

Officials are calling customers in the affected area to share the information. 

American Water said a failed water quality test in the Webster Groves area is responsible for the boil advisory. The advisory affects 59,000 customers including multiple schools. 

Precautionary boil order issued for a portion of St. Louis County

The affected area runs roughly from Glendale, Shrewsbury and Webster Groves south to the intersection of I-270 and I-55, east to the St. Louis City border, west to I-270 in Sunset Hills, American Water said.

This includes Affton, Sappington, Oakland, Crestwood and Sunset Hills. 

Water will need to be brought to a boil for three minutes prior to consumption, until further notice. American Water said tap water is okay for washing, bathing and other non-consumable uses during this time.

Additional water quality tests are being run.

Officials said boil advisories typically last 48-72 hours.

Customers are advised to flush the internal plumbing in their homes by letting water run for a few minutes once the advisory is lifted. 

Copyright 2019 KMOV (Meredith Corporation). All rights reserved

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