California Code, Health and Safety Code - HSC § 5474.9

Revenues derived from fees or charges imposed pursuant to Section 5474 shall be used only for the acquisition, construction, reconstruction, maintenance and operation of sanitation or sewerage facilities, to pay municipalities for sewer service collection charges, to repay principal and interest on bonds issued for construction or reconstruction of such sanitation or sewerage facilities and to repay federal or state loans or advances made to entities for the construction or reconstruction of sanitation or sewerage facilities; provided, however, that such revenue shall not be used for the acquisition or construction of new local street sewers or laterals as distinguished from main trunk, interceptor and outfall sewers.