WSP03388

• File Number: 8041
• Description: 208 Clean Water Grant
• State: CO
• Date: 3/4/1982
• Author: CWCB
• Title: Quarterly Reports on the 208 Clean Water Grant for the Water Quality Control Division of the Coloradio Dept of Health
• Water Supply Pro - Doc Type: Publication

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MEMORA.NDUM

COLORADO WATER CONSEKVATlON DOAKD
J. William McDonJltJ
DirecTor

TO:

Dan Law

FROM:

Dean Stindt flt5

DATE:

November 30, 1981

I SUBJECT: Impact Analysis of NPDES Industrial Discharges on
Colorado River Salinity

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The subject analysis takes a close look at information presented in the
memorandum dated November 19, 1981. The eighteen NPDES permits for which annual
salt contributions were determined are considered cumulatively in an attempt to
determine the importance of Colorado industrial discharges to resultant
increases in salinity levels of the river. The following tabulation will
develop, for the 18 permits analyzed, the total flow (acre feet/year), the
average TDS concentration (mg/L), and the total salt discharged (tons/year).

NPDES permit # Average flow of Average TDS Concentration Sal t di scharged for
discharge for of discharge for 6/80 to 7/81
6/80 to 7/81 6/80 to 7/81 (mg/L) (tons)
(!'.GO)
1. CO 0036394 .467 990 704
2. CO 0036285 .086 1308 171
3. CO 0000515 .302 18439 8498
4. CO 0027146 .128 3168 625
5. CO 0000396 .080 1095 230
6. CO 0036439 .027 1714 71
7. CO 0000213 .085 2445 344
8. CO 0000221 .214 1908 735
9. CO 0032638 .044 1722 126
10. CO 0029599 .029 1314 57
11. CO 0036501 .013 1653 32
12. CO 0000132 .239 3706 1334
13. CO 0032135 .010 1586 23
14. CO 0033146 .027 2240 16
15. CO 0033961 1.307 1418 2689
16. CO 0000051 .238 1672 604
17. CO 0029947 .005 5505 37
18. CO 0034045 ~ 1204 1018
Av:erage flow= 3.863 MGD Average TOS Concentration Total salt discharged
= 4365 AF/year = 2949 mg/L = 11314 tons/yr.

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