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Median =100 cfu/100ml Avg. 567 cfu/100ml 2010

.0. Median =100 cfu/100ml Avg. 567 cfu/100ml 2010. Summary. pH is elevated to extremes by severe suspended algal densities avg. pH = 8.4 (max 8.84 units). Total Phosphorus Is low, avg 0.27 mg P/l, less than 0.3 mg/l targeted for urban rivers by OEPA.

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Median =100 cfu/100ml Avg. 567 cfu/100ml 2010

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  1. .0

  2. Median =100 cfu/100ml Avg. 567 cfu/100ml 2010

  3. Summary • pH is elevated to extremes by severe suspended algal densities avg. pH = 8.4 (max 8.84 units). • Total Phosphorus Is low, avg 0.27 mg P/l, less than 0.3 mg/l targeted for urban rivers by OEPA. • Nitrate was high ~ 4.0 mg N/l, max 13 mg N/l from row crops. • N:P molar ratio was 18:1, > Richardson ratio of 14, with excess N. Algae likely P-limited. • Conductivity = 673 uS, max 1084 uS about normal for limestone bedrock. • Fecal coliforms = median 100, avg. 567, max = 14700 polluted.

  4. This Year March to Nov. • Pick some sites of interest to you. • Get two bottles per site tonight and site descriptors. • Join us on 3rd Sat. of each month at 10:00 am for sample turn in and analysis. We will train you.

  5. What’s New for 2011? • We have received an equipment grant from Hamilton County Soil and Water District to buy all new meters and spectrophotometer, and supplies for 2011. • We have applied for a public outreach grant from the same source to expand the public’s awareness of the watershed and its health.

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