Miss NV5 on Twitter, LinkedIn or Facebook? Attached are NV5’s September posts about Water Conservation and Infrastructure Design
- Most traditional water & wastewater infrastructure is designed for 100 gallons per day per person. What is your infrastructure designed for?
- Avg indoor water use in the US is 60 to 70 gpd. New construction meeting CALgreen, LEED or EPA Water Sense stds uses 40 to 45 gpd per person.
- CALGreen is the State of California Green Building code that added prescriptive low flow water fixture requirements for all new construction.
- Low flow fixtures: 1.28 gal/flush toilets; 2.0 gpm showers; 1.8 gpm kitchen & 1.5 gpm bathroom faucets; 5.8 gal/cycle dishwasher & WBIC
- Weather Based Irrigation Controllers (WBIC) & the California required Landscape Ordinance will save 13,500 gal/yr/new home on average.
- There is a significant disconnect between actual water use and how we size our infrastructure and construction cost can be reduced.
- Water efficiency for new & retrofitting for exist can save water and create capacity in our existing infrastructure or defer needed expansion
- Retrofitting avg CA house Pre 1970 saves 52,500 gal/yr (.16 ac-ft); Pre 1980 =41,500 gal/yr (.13 ac-ft); Pre 1994 =23,500 gal/yr (.07 ac-ft)
- See water numbers for 2 NV5 Utah projects comparing state code and Utah avg in gal/day for 3.8 people per house and 3000 sf of landscape.
- With CALgreen NV5 helped Manteca, CA reduce sewer generation rates by 50% and sewer fees by $39 million for City master plan infrastructure
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