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Wastewater

The County of San Bernardino requires a home builder to either connect to an available sewer system, or if no sewer system is available, to construct an Onsite Wastewater Treatment System (OWTS), also known as a septic system. Septic systems have the potential to contaminate groundwater and create a nuisance. An improper septic system design or design rate could lead to premature system failure, degradation of groundwater and other forms of contamination. Therefore, the design and siting of a septic system is critical. In order to properly design a septic system a qualified professional must conduct a percolation test to determine the soil’s absorption rate. A qualified professional is a Registered Civil Engineer, Certified Engineering Geologist, Geotechnical Engineer, Registered Geologist, or Registered Environmental Health Specialist. DEHS will review all percolation reports submitted to evaluate the testing methods, calculations, and determined design rate.



Septic

Homeowner Resources


Where is My Septic System?

¿Dònde está mi Sistema Séptico?

EPA Septic System Information





Onsite Waste Water Disposal


How to Calculate for Design Rates, Absorption Area and Total Feet
For Engineers and other Percolation Testing/Septic System Designers

Minimum Setback and Location of Septic System

On-Site Waste Water Disposal System

Minimum Setback List - Liquid Waste Disposal System

Sizing Your Septic System
How to size your leachlines, infiltrators or pits




Helpful Links


CA Onsite Wastewater Treatment Systems Overview

Designated Maintenance Areas (DMA) Facts

FAQs for Single Family Residence Septic Systems

FAQs for Multi-Family Residential and Commercial Septic Systems

Liquid Waste Pumper Requirements for the Disposal of Sanitary Waste

Septic Systems Focus of Proposed New Statewide Policy Fact Sheet

Special Event Portable Toilet Recommendations
Chart to calculate the number of portable toilets necessary for an event





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