Total Suspended Solid (TSS) is detrimental to fish health by decreasing growth, disease resistance, and egg development.
At low concentrations, TSS ( in mg/L for soil erosion, or mikrogram-chlorophyll/L for algae) is roughly equal to turbidity in NTU.
TSS in treated discharges may be used as a preliminary screening measure of pollutant removal.
a. if effluent TSS <45 mg/L , discharge generally complies with effluent limits.
b. if effluent TSS >45 mg/L , analyze discharge for other constituents that may exceed discharge limits.
Eugene R. Weiner. Application of Environmental Aquatic Chemistry. A Practical Guide. Third edition. CRC Press