Project Info

Central Coast Blue is a local water sustainability project that will create a new, high quality, and reliable water supply for our Five Cities communities, including Arroyo Grande, Pismo Beach, Grover Beach, and Oceano. Agencies representing the Five Cities communities are designing and building a new advanced water purification facility to create a high-quality water source to supplement local supplies. This project will allow us to have sufficient supplies even in times of water shortage or drought.

Current Water Supply

The Five Cities communities currently get their water from a combination of surface water (water that collects surface streams, lakes, and reservoirs) and groundwater (water found in underground aquifers). The surface water sources are the State Water Project and the Lopez Lake Reservoir and the groundwater source is the Santa Maria Groundwater Basin (SMGB). During times of drought, less water is available from both surface water and groundwater sources.

Project Overview

Central Coast Blue is a regional recycled water project that will develop a sustainable water supply and protect the Santa Maria Groundwater Basin (SMGB). The recent drought drastically impacted water resources for the Five Cities communities and highlighted the need for a sustainable, drought-proof source of supply to ensure that reliable water supplies will be available for future extended droughts. Currently the water from

Proposed Facilities

Central Coast Blue will include upgrades to the existing wastewater treatment plant processes. These upgrades include Microfiltration/Ultrafiltration, Reverse Osmosis, and Ultraviolet disinfection with Advanced Oxidation. These process upgrades are referred to as Advanced Treatment and they are discussed in depth here. In addition to the process upgrades, Central Coast Blue will also require injection wells to recharge the groundwater basin…