WATER QUALITY TRANSITION ZONE.
Austin City Code § 25-8-452
in effect§ 25-8-452 - WATER QUALITY TRANSITION ZONE.
(A) Development is prohibited in a water quality transition zone that lies over the South Edwards Aquifer recharge zone, except for:
(1) development described in Article 7, Division 1 (Critical Water Quality Zone Restrictions); and
(2) minor drainage facilities or water quality controls that comply with Section 25-8-263 (Floodplain Modification) and the floodplain modification criteria in the Environmental Criteria Manual.
(B) Development is prohibited in a water quality transition zone that lies outside the South Edwards Aquifer recharge zone, except for:
(1) development described in Article 7, Division 1 (Critical Water Quality Zone Restrictions);
(2) streets or public mobility projects in the right-of-way;
(3) minor drainage facilities or water quality controls that comply with Section 25-8-263 (Floodplain Modification) and the floodplain modification guidelines of the Environmental Criteria Manual; and
(4) duplex or single-family residential development with a minimum lot size of two acres and a density of not more than one unit for each three acres, excluding acreage in the 100-year flood plain.
(C) A lot that lies within a critical water quality zone must also include at least two acres in a water quality transition zone or uplands zone.
Source: Sections 13-2-563(b), (c), (d), and (e); Ord. 990225-70; Ord. 031211-11; Ord. 20131017-046; Ord. No. 20220519-094, Pt. 14, 5-30-22; Ord. No. 20221027-045, Pt. 35, 11-7-22.
Source: City of Austin, City Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/tx/austin/codes/code_of_ordinances?nodeId=TIT25LADE_CH25-8EN_SUBCHAPTER_AWAQU_ART11WASURUWARE_S25-8-452WAQUTRZOFetched: 10/27/2026