Monitoring required.
Houston Code of Ordinances § 47-723
in effectSec. 47-723. - Monitoring required.
(a) Every high-risk facility that has storm water discharges associated with industrial activity shall undertake all of the following applicable monitoring:
(1) Required by an individual NPDES or TPDES storm water permit if the facility has an individual storm water permit;
(2) Required by a general NPDES or TPDES storm water permit, other than TPDES permit number TXR050000 if the facility has coverage under such a permit; or
(3) Required by TPDES permit number TXR050000, or any successor permit thereto, if neither (i) or (ii) above apply; as applicable.
(b) If a high-risk facility does not have storm water discharges associated with industrial activity, the facility annually shall analytically monitor and analyze storm water discharges from its facility during a representative storm event on an outfall-by-outfall basis for each of the following parameters:
(1) Any pollutants limited in an existing NPDES or TPDES permit for the facility;
(2) Total oil and grease;
(3) Chemical oxygen demand;
(4) pH;
(5) Biochemical oxygen demand, five-day;
(6) Total suspended solids;
(7) Total phosphorus;
(8) Total Kjeldahl nitrogen;
(9) Nitrate plus nitrite nitrogen;
(10) Any other discharges required to be monitored under Section 122.21(g)(7)(iii) and (iv) of Title 40 of the CFR;
(11) Any pollutants for which effluent limitations are imposed in the city's storm water permit for its MS4; and
(12) Any other pollutant that the city has determined the facility is discharging that contributes a substantial pollutant loading to the MS4.
(c) If a type 2 facility does not have storm water discharges associated with industrial activity, the facility annually shall analytically monitor and analyze storm water discharges from its facility during a representative storm event on an outfall-by-outfall basis for each of the following parameters:
(1) Chemical oxygen demand;
(2) Total oil and grease;
(3) pH;
(4) Any pollutants for which effluent limitations are imposed in the city's storm water permit for its MS4; and
(5) Any other pollutant that the city believes the facility may be contributing to the MS4 or waters of the United States.
(Ord. No. 01-800, § 3, 8-29-01; Ord. No. 2016-864, § 20, 11-9-2016)
Source: City of Houston, Code of Ordinances and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/tx/houston/codes/code_of_ordinances?nodeId=COOR_CH47WASE_ARTXIISTWADI_DIV4STWADIINHIRIFA_SDBMORE_S47-723MOREFetched: 10/26/2026