Sustainable Water Infrastructure Ivy Anderson Andey Nunes

Primary Environmental Concerns Diverse water supply: right level of treatment for right use Impacts of development on stormwater: discharge vs. recharge Economically viable and climate adaptive wastewater treatment goal is to create a water independent community in accordance with natural hydrology

Adequate Water Sources Does the Urban Water Management Plan (required by SB610/SB221) incorporate diverse water sources? What diverse sources could reduce water supply demand in all conditions? Potable water only for potable uses: built-in adaptation infrastructure 20 year Water Supply considerations: rainwater for household non-potable use, graywater for landscape use, commercial/industrial re-use Document water supplies available during normal, single dry, and multiple dry water years during a 20-year projection and the existing and projected future water demand during a 20-year projection. The Act requires that the projected supplies and demands be presented in 5-year increments for the 20-year projection.

50,000sf= lMG water Water Supply Decisions

Diverse Water Sources: treatment appropriate for use rainwater catchment for urban agriculture & other non-potable use graywater (laundry to landscape) potable water only for potable use wastewater reclamation for industry, landscape, and other approved purple pipe

Sustainable Stormwater Infrastructure How can the stormwater impacts of development be minimized to protect water quality for existing habitat and surface waters? Manage stormwater as close to the source as possible to reduce or eliminate the volume of water and pollutants leaving the site. Integrate stormwater in site development, building and landscape designs Reduce impacts from impervious surfaces such as streets, parking lots, rooftops and other paved surfaces Locate and design streets to protect stream corridors and reduce high flows and polluted runoff.

Impervious Surface Management green streets smart development impermeable surface charge to fund decentralized treatment systems

Synergy of Stormwater Management and Rainwater Catchment for non-potable use habitat creation ecological education landscape & recreation industry flushing toilets

Design decentralized, integrated systems of treatment and reuse of household wastewater. Match water quality to need- reuse greywater for non-potable applications Reduce consumption of virgin water sources Can wastewater be properly treated and reused onsite in low-density residential zones?

Decentralized Greywater Systems Source:

Low energy, low cost technique for removing phosphates, nitrogen, and other contaminants from wastewater before reuse or discharge into bay. Reuse of properly treated wastewater for landscaping and other non-potable uses. Preservation and protection of open space and vulnerable wetland habitat Educational and recreational opportunities for our community Can wastewater from the high density commercial zone be integrated into a centralized constructed wetland for proper treatment? Source: epa.gov

Constructed Wetlands: Wastewater Treatment and Reclaimed Water Production

Can wastewater infrastructure also be used to mitigate some of the negative impacts of climate change and ensure emergency preparedness in our community? Constructed Wetlands & Sealevel rise Saltwater intrusion Mitigating impacts of increased storm events and surface water runoff Conservation of potable water sources for drought years.