Skip to main content
CityRuleLookup
Water Use Rules

How St. Louis Handles Water Use Rules: A Practical Guide

By CityRuleLookup Editorial Team

St. Louis maintains 156 local ordinances across all categories, and 2 of those deal specifically with water use rules. Here is a breakdown of what the city actually requires, what is prohibited, and where St. Louis falls on the strict-to-permissive spectrum compared to other cities.

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.

Key details: Public-side repairs: City Water Division repairs at no cost. Age threshold: Service line must exceed one year. Eligible accounts: Flat-rate or ≤6-unit metered residential. Funding source: $3.00 quarterly surcharge on water bills. Private-side rule: Owner must repair or risk shutoff.

Refusing or neglecting to repair a leaking private-side service line lets the Water Commissioner shut off water without notice for emergencies; restoring service requires paying the disconnection cost under § 23.04.071.

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.

Key details: Grey water use: Water closets, urinals, trap primers. Grey water installer: Licensed Master or Journeyman Plumber. Reclaimed water installer: Plumber or Master Drainlayer. Homeowner rainwater exemption: Tanks up to 65 gallons. Enforcing office: Office of Plumbing and Sewer Inspection.

Installing grey water or reclaimed water plumbing without a licensed Master Plumber, Journeyman Plumber, or Master Drainlayer violates St. Louis's Plumbing Code and can trigger a stop-work order or permit denial.

The Bottom Line

St. Louis's water use rules rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming St. Louis is broadly strict or permissive.

This guide is based on St. Louis's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.