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N.Bend/R.Miami OH [River Mile 490]

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Figure 11-10 Long-term trends of DO at North Bend/Ft. Miami, Ohio (River Mile 490). (RF1-05090203012) Source: USEPA STORET.

quality factors (Cleary, 1978; Wolman, 1971). ORSANCO (1979) reports greater than 98.8 percent compliance for 15 out of 20 examined stream quality criteria. In 1990, ORSANCO published a statistical analysis of data resulting from water quality monitoring conducted over an 11-year period. Decreasing trends at individual sampling points were reported for a majority of the contaminants examined, and overall improving trends are indicated for total phosphorus, ammonia, nitrogen, copper, lead,

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