ABSTRACT:

This dataset supports the study on the effects of greywater reuse systems on soil quality in Santa Clara County, California, particularly within the context of drought-induced water conservation efforts. The data includes soil characteristics collected from 30 households with operational Laundry to Landscape (L2L) greywater systems. Parameters measured include pH, electrical conductivity (EC), soil organic matter, sodium adsorption ratio (SAR), cation exchange capacity (CEC), and various nutrient and metal concentrations.

Soil samples were collected at three distances from the greywater outlet (12 cm, 1.5 m, and 3 m) and analyzed to evaluate the impact of system age and compliance with California’s plumbing codes on soil properties. The dataset provides critical insights into the potential for greywater reuse to alter soil chemistry, particularly in relation to salinity, nutrient content, and metal accumulation. These findings are crucial for developing sustainable greywater management practices and ensuring long-term soil health in drought-prone residential areas.

ABSTRACT:

With the increase in potable water scarcity, many agencies in different parts of the world have invested in water conservation programs, such as laundry-to-landscape (L2L) greywater systems, which reuse washing machine greywater for irrigation. This Data was gathered as part of a field study for my thesis research. Twenty-one greywater characteristics of thirty households with Laundry to landscape greywater systems in Santa Clara County, California, were analyzed. pH, electrical conductivity (Ec), sodium adsorption ratio (SAR), nitrogen, sodium (Na), calcium (Ca), Fecal Coliform (FC), magnesium (Mg), potassium (K), calcium (Ca), sodium (Na), chlorine (Cl), total dissolved solids (TDS), NO3 (as nitrate), phosphorus, carbonate CO3 as (CaCO3), bicarbonate HCO3 as (HCO3), total organic carbon (TOC), biochemical oxygen demand (BOD), iron (Fe), manganese (Mn), boron (B) and Sulfate (SO4) were analyzed in the lab.
Also, the plants irrigated with greywater, whether households were following California plumbing code, and system age were recorded as well.