FLOOD03246

• County: Statewide
• Community: Nationwide
• Basin: Statewide
• Title: Pollution Characteristics of Stormwater Runoff Completion Report
• Date: 9/1/1978
• Prepared By: CSU Environmental Resources Center
• Floodplain - Doc Type: Educational/Technical/Reference Information

TABLE 5
Concentration of Pollutants from Dallas Stormwater
(Dallas Water utility, 1977)
Min. Max. Ave.
, 5 sites
DO 0 5+ mg/9,
BOD 0 21 6.2 mg/9,
COD 22 167 67.3 mg/9,
TS 48 1480 581 mg/9,
TSS 18 1368 349 mg/9,
N 0.28 10.48 2.28 mg/t
P 0.13 5.40 0.87 mg/9,
Hg 0.06 16.25 1.15 Ilg/9,
Pb 0 1300 227 Ilg/9,
Zn 30 330 98 Ilg/9,
Sr 70 750 349 Ilg/9,
Fecal Coliform 251 26000 6530 coli/lOO ml
Chlorphenoxy
Herbicides 0.016 1. 94 0.56 llg/t
Chlorinated
Hydrocarbons 0.006 0.105 0.021 Ilg/9,
Organic Phosporus
Carbonates 0 0.018 .003 Ilg/9,

the stormwater contributed 99% of the suspended solids and 75%

of the BOD in the stream on the day of the storm with the

remaining 1% TSS and 25% BOD being contributed by the sewage

treatment plant effluents. It was also estimated that the BOD

contribution of the stormwater for the single storm was equivalent

to 17 days of effluent discharge from a sewage treatment plant

serving the same drainage area,discharging 10 mg/9, BOD, and the

total suspended solids was equivalent to 361 day discharge of

11

"