Table 6. Selected water-quality data for the Grand River near Sumner at gage station 06902000, water years 1988 and 1992 (USGS 1988; USGS 1992, MDNR 1992, Code of State Regulations 10 CSR 20.7).
State Standard Water Year
Parameter I III VI VII 1988 1992
Temperature (oF) 90o max - - - 32-86 32-77.9
Specific Conductance (ys/cm) - - - - 220-540 318-510
Ph - - - - 7.4-8.1 7.8-8.2
Turbidity (NTU) - - - - - 16-140
Sediment, suspended (mg/L) - - - - 39-2930 75-384
Oxygen, dissolved (mg/L) 5 - - - 6.4-13.9 7.3-13.7
Coliform, fecal - - - 200-storm runoff K60-12,000 K16-K70,000
Streptococci, fecal (colonies/100ml) - - - - K25-95,000 K52-K83,000
Total Hardness (mg/L CaCO3) - - - - 110-260 140-250
Nitrogen, Total Ammonia (mg/L as N) Depends on temp & Ph - - - <0.010-0.340 0.030-0.100
Phosphorus, Total (mg/L as P) - - - - 0.070-0.250 0.110-0.340
Manganese,dissolved (yg/L as Mn) - 50 - 50 34-370 8-61
Iron, dissolved (mg/L as Fe) 1,000 300 300 12-400 7-130

K: Non-ideal count of colonies (e.g., sample was not diluted enough, colonies merged)

I: Protection of aquatic life

III: Drinking water supply

VI: Whole-body-contact recreation

VII: Groundwater

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