Water Use Rules in St. Louis, MO (2026)
2 verified water use rules for St. Louis, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Recycled Water Rules
St. Louis requires grey water and reclaimed water plumbing systems to be installed only by a licensed Master Plumber, Journeyman Plumber, or Master Drainlayer under the city's Plumbing Code.
St. Louis Grey & Reclaimed Water Rules
Some RestrictionsSt. Louis Revised Code § 25.04.020 (Plumbing Code Amendments, Section 118 — Use and Re-Use of Non-Potable Water Within or Upon a Premise)
1. Grey water collected from plumbing drainage piping and used within a building for appropriate purposes i.e., water closets, urinals, trap primers, shall be installed as licensed and permitted by this Code by a licensed Master Plumber or a licensed Journeyman Plumber. 2. Reclaimed water delivered to a building site/premises by a public reclaimed water distribution system's series of mains and...
Leak Reporting Duty
St. Louis's Water Division must repair a leaking underground service line, from the water main through the T-head valve and stop box, free of charge when it's over a year old, serves a small residential account, and the leak sits in a public street, alley, or easement.
St. Louis Water Service Line Leak Repair Duty
Some RestrictionsSt. Louis Revised Code § 23.04.070
Whenever any underground service pipe...to and including the service line, T-head valve, and stop box and its cover, which line exceeds one year in age and is found to be leaking...and the water assessment is billed to any flat rate residential or metered account having six or less dwelling units, it shall be the duty of the City Water Division to repair same, if the leak is located within any ...