Water sampling location

Biotesting result by the reaction of different test organisms

Mortality of D. magna, %

Biomass growth of S. quadricauda, % to the control

Toxicity index by P. caudatum, c.u.

“Ecolum” toxicity index, c.u.

Wastewater, Outlet №1

0

7±0.7

0.15±0.08

12.5±1.6

Wastewater, Outlet №2

0

8±1.1

0.36±0.06

26.6±5.1

Natural surface water, 500 m from outlet

0

21±1.9

-0.18±0.06

-40.5±11.6

Natural surface water, 3000 m from outlet

0

15±0.9

-0.22±0.9

-36.7±9.5

Ivanovskaya duct

0

14±0.9

-0.25±0.07

-15.4±5.4