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Water Quality in the Caddo Lake Watershed

Caddo Lake Water Quality Cypress Creek Clean Rivers Program. Water Quality in the Caddo Lake Watershed. Monitoring Station Types. Routine monitoring is used to follow trends and to identify water quality changes in the major watersheds.

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Water Quality in the Caddo Lake Watershed

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  1. Caddo Lake Water Quality Cypress Creek Clean Rivers Program Water Quality in the Caddo Lake Watershed

  2. Monitoring Station Types • Routine monitoring is used to follow trends and to identify water quality changes in the major watersheds. • Systematic monitoring is a screening tool used to detect potential concerns. Typically placed on the smaller streams. Biological monitoring is a key factor. • Special study monitoring projects are located and designed to address a specific concern.

  3. Field Temperature Dissolved Oxygen Conductivity pH Secchi Depth Diel Sampling Conventional Suspended Solids Dissolved Solids Chloride Sulfate Hardness Alkalinity Nutrients –Ammonia, Nitrate & Organic Nitrogen, Phosphorus Chlorophyll Bacteria Water Quality Parameter Sets

  4. Other Sample Sets • Metals in Water and in Sediment • aluminum, arsenic, chromium, copper, nickel, silver, zinc, barium, molybdenum, selenium, iron, and manganese • Habitat & Biological • Fish & Macroinvertebrates (Benthics)

  5. Average Annual Inflow to Caddo LakeDuring 1979 – 2004

  6. Black Cypress BayouStation 10245 pH Dissolved Oxygen (mg/l) • Average 6.4 Average 7.0 • Median 6.4 Median 6.6 • Range 5.3-8.6 (71) Range 2.3-11.8 (72) Chlorophyll a (mg/l) Average 7.65 Median 5.00 Range 0.20-58.00 (65)

  7. Nitrogen (mg/l) Station 10245 Nitrate + Nitrite Nitrate Average 0.11 0.13 Median 0.10 0.08 Range 0.04-0.28 (26) 0.02-0.79 (38) Ammonia TKN Average 0.08 0.58 Median 0.05 0.54 Range 0.0-0.277 (65) 0.03-1.27 (34)

  8. Total Phosphorus (mg/l) Station 10245 10246 Average 0.08 0.10 Median 0.08 0.08 Range 0.01-0.26 (66) 0.03-0.20 (25)

  9. Little Cypress Bayou Station 10332 pH Dissolved Oxygen (mg/l) Average 6.6 7.0 Median 6.6 6.9 Range 5.2-8.6 (157) 2.3-13.7 (154) Chlorophyll a (mg/l) Average 6.66 Median 5.00 Range 0.20-58.00 (65)

  10. Nitrogen (mg/l) Station 10332 Nitrate + Nitrite Nitrate Average 0.14 0.09 Median 0.10 0.07 Range 0.05-0.40 (68) 0.02-0.26 (22) Ammonia TKN Average 0.08 0.76 Median 0.05 0.70 Range 0.01-0.90 (122) 0.20-2.90 (109)

  11. Total Phosphorus (mg/l) Station 10332 15773 Average 0.11 0.21 Median 0.09 0.14 Range 0.01-1.10 (122) 0.01-1.34 (20)

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