Detention, sedimentation and filtration for water quality control.
San Antonio City Code § 34-960
in effectSec. 34-960. - Detention, sedimentation and filtration for water quality control.
(a) All multi-family and commercial developments of land with projected impervious cover exceeding fifteen (15) percent shall comply with the provisions of this division.
(b) All multi-family and commercial development shall install detention, sedimentation and filtration basins in accordance with technical guidelines acceptable to SAWS, and which include at least the following design and control features:
(1) At a minimum, the water quality basins and drainage into the basins shall be designed to capture and isolate at least the first one-half (½) inch of runoff. All subsequent runoff in excess of the design capacity of the basins shall bypass the basins and remain segregated from the contained runoff waters including those waters in a peak shaving basin if required.
(2) Input to and release from water quality basins shall utilize vegetated swales and/or overland flow dispersion measures where possible.
(c) No infiltration trenches will be allowed on the Edwards Aquifer recharge zone.
(Ord. No. 81491, § 1(App. I), 1-12-95)
Source: City of San Antonio, City Code, City Charter and Unified Development Code (Municode Library, library.municode.com)URL: https://library.municode.com/tx/san_antonio/codes/code_of_ordinances?nodeId=PTIICO_CH34WASE_ARTVIWAQUCOPOPR_DIV6AQREZOWAPR_SDEADCOST_S34-960DESEFIWAQUCOFetched: 10/27/2026