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Drinking Water Mark Osborn December 3, 2014 Source Water Lakes L1 - PowerPoint PPT Presentation

Nutrient Criteria and Lakes Used for Drinking Water Mark Osborn December 3, 2014 Source Water Lakes L1 (Total) 112 L1 (with WQ data) 62 L2 (with WQ data) 7 Drinking Water Lakes Y X Y X X Y X X Y Y X Class X Y X Y X Y Y


  1. Nutrient Criteria and Lakes Used for Drinking Water Mark Osborn December 3, 2014

  2. Source Water Lakes L1 (Total) 112 L1 (with WQ data) 62 L2 (with WQ data) 7

  3. Drinking Water Lakes Y X Y X X Y X X Y Y X Class X Y X Y X Y Y Y X Y X X Y Y X X Y X Y L1 X Y X Y X Y Y X Y X X Y Y X X X Y Y Y X X Y X Y ( ! L2 X YX Y X X Y X Y X Y X X Y Y X Y Y X Y X Y X Y X Y Y X X Y Lake Ecoregion X Y Y X X Y X Y Y X X Y X Y X Y Y X X Y X Y X Y X Y Y X Y X ! ( Ecoregion Y X X Y Y X X Y Y X Y X YX X Y X Y X Y X Y ! ( Big Rivers Y X ! ( X Y Y X X Y X Y Y X ! ( X Y Y X Ozark Border ³ Y X X Y X Y X Y Ozark Highlands X Y Y X Y X Y X Y X Plains X Y X Y Y X Y X X Y Y X Y X Y X YX X X Y X Y Y X Y X Y Y X X Y Y X Y X Y X Y X Y X ! ( Y X ! ( Y X Y X Y X X Y YX Y X ! (

  4. E E E E E E Drinking Water Lakes E E E E E Trophic Status E E E EE E E E Mesotrophic E E E E Eutrophic E E E E Hyper-Eutrophic E E E E No Data E E E E E E E ³ E E E E E EE E E E E E E

  5. Trophic Definitions – Median Phosphorus Levels Trophic Status Median TP (µg/L) Number of Lakes Oligotrophic <10 0 ≥10 – 25 Mesotrophic 9 ≥25 – 100 Eutrophic 52 ≥100 Hyper-Eutrophic 8

  6. Trophic Definitions – Median Chlorophyll-a levels Trophic Status Median Chl-a (µg/L) Number of Lakes Oligotrophic <3 0 ≥3 – 9 Mesotrophic 11 ≥9 – 40 Eutrophic 49 ≥40 Hyper-Eutrophic 9

  7. States with Chl-a Criteria for Lakes (µg/L) 10 - 15 3 - 20 5 - 45 8 - 10 10-30 10-20 4 - 18 0.6 - 1.5 10 - 60 15 - 40 30 - 50 18 10 10-40 5 - 27 5 - 27 5 - 20 Site Specific Chl-a Criteria 6-20 Statewide Chl-a Criteria

  8. States with TP Criteria for Lakes (µg/L) 10 - 54 * 12 - 90 5 - 40 15 - 380 25 100 - 330 40 - 50 50 50 30 - 40 8 - 150 7 - 30 10 - 40 115 - 160 100 14 - 16 20 - 90 * Site Specific TP Criteria 10 - 160 Statewide TP Criteria "*" TP Criteria is Load (lbs/acre or lbs/acre-foot)

  9. Questions?

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