1. Impacts of Livestock Waste on Surface Water Quality By the North Dakota Department of Health Division of Water Quality For the Livestock Manure Nutrient Management Workshops Devils Lake - March 7-8 Valley City - March 9-10 Dickinson - March 14-15 Minot - March 16-17

2. Beneficial Uses of Water Drinking Water/ Human Health Recreation Industrial Agricultural Aquatic Life

3. Pollutants Associated With Livestock Waste Nutrients (nitrogen, phosphorus, etc.) Ammonia Nitrate BOD (300-600 times) Pathogens (E. coli, Cryptosporidium) TSS Hormones Antibiotics

4. Impact On Surface Water Quality

5. Scale of Impacts Local (upstream / downstream) Watershed Statewide

6. Local Impacts Chemical Impacts Physical/Habitat Impacts

10. Local Impacts Chemical Impacts –Nutrient impacts based on monitoring conducted on livestock waste systems in the Big Sioux River watershed –Acknowledgements to Dave German, SDSU, Brookings, SD

11. Miller Feedlot North of Oakwood Lake Before Installation of the Animal Waste System

12. Miller Feedlot After construction of the Animal Waste System Looking North

13. Miller Feedlot After construction of the Animal Waste System Looking South toward Oakwood Lake

14. Animal Waste System Installed

17. 28 Samples 21 Samples 28 Samples 21 Samples

18. 28 Samples 27 Samples 21 Samples 28 Samples 27 Samples 21 Samples

19. 27 Samples 21 Samples

20. Watershed Effects

21. 20,000 acres - 12,000 crop - 8,000 pasture 4 ag waste sites - 100 head - 300 head - 500 head - 1,500 head

22. BMPs Applied 6,000 acres of cropland treated with no-till –7.20 per acre for 2 years = $86,400 All 4 ag waste sites treated with total containment –Assumes annual lot clean out and utilization on cropland in watershed –$ 50,000 per system (no frills) = $200,000

23. Total Nitrogen Reduction Source Loading Before Treatment (lbs/year) Load Reduction w/ BMPs (lbs/year) Loading After Treatment (lbs/year) Percent Reduction Cropland 52,416.011,982.6 40,433.4 (22.9) 39.3 100 head 962.1 769.7 192.4 (80) 2.5 300 head 2,886.2 2,309.0 577.2 (80) 7.6 500 head 4,810.4 3,848.3 962.1 (80) 12.6 1500 head 14,431.111,544.9 2,886.2 (80) 38.0 Total 75,505.830,454.5 45,051.4 (40.3) 100.0

24. Total Phosphorus Reduction Source Loading Before Treatment (lbs/year) Load Reduction w/ BMPs (lbs/year) Loading After Treatment (lbs/year) Percent Reduction Cropland 15,464.54,536.1 10,928.4 (29.3) 52.2 100 head 192.4 173.2 19.2 (90) 2.0 300 head 577.2 519.5 57.7 (90) 6.0 500 head 962.1 865.9 96.2 (90) 10.0 1500 head 2,886.22,597.6 288.6 (90) 29.9 Total 20,082.48,692.2 11,390.2 (43.3) 100.0

25. Statewide Effects

26. 2004 Integrated Water Quality Assessment Report Recreational use impaired for an estimated 3,850 miles of rivers and streams, due to pathogens (Fecal coliform) Approximately 2,515 river and stream miles impaired for aquatic life use due to habitat degradation

27. 2004 Integrated Water Quality Assessment Report Nutrient enrichment is affecting approximately 149,850 lake acres in the state