Phosphorus (P) in onsite sewage treatment and disposal systems is a concern because P can impair water quality even lower concentrations than nitrogen. This 8-page fact sheet summarizes the sources of P in septic tank effluent and the forms. concentrations. and behavior of P in the septic tank effluent and the drain field. https://unitedssports.shop/product-category/clothing-womens-tops-bras/