Ambient Water Quality Guidelines for Chlorophenols

Water Quality

Ambient Water Quality Guidelines for Chlorophenols

GUIDELINES FOR WATER

The level of chlorophenols in the water in which fish live, should not exceed the guidelines given below.

0.1 µg/L monochlorophenols
0.2 µg/L dichlorophenols

Guidelines for Fish Muscle (wet weight)

The levels of chlorophenols in fish muscle should not exceed the guidelines below.

10 µg/g 2-monochlorophenol
20 µg/g 3-monochlorophenol
40 µg/g 4-monochlorophenol
80 µg/g 2,3-dichlorophenol
0.2 µg/g 2,4-dichlorophenol
20 µg/g 2,5-dichlorophenol
30 µg/g 2,6-dichlorophenol
50 µg/g 2,4,6-trichlorophenol
20 µg/g 2,3,4,5,6-pentachlorophenol

Toxicity Guidelines (to protect aquatic life)

The recommended toxicity guidelines for the chlorophenols in Table 1.1.2 are in µg/L, calculated for 10C. The temperature conversion factor is 2 for every 10C change in temperature (the value would be multiplied by 2 at 0C and by 0.5 at 20C). The change in the guidelines caused by applying this factor would be small for the normal ambient temperatures found in British Columbia.

Correction for different pH levels is more complex; guidelines for pH values in the range pH 5.7 to pH 9.2 were calculated for the chlorophenols and are found in Table 1.1.2. The guidelines for pentachlorophenol are final since they are based on good primary data. The guidelines for the other chlorophenols are based on a ratio with PCP and these should be considered interim guidelines until properly controlled experiments can provide a unified temperature and pH-dependent regression equation for each chlorophenol. The levels of chlorophenols in water containing aquatic life should not exceed the guidelines given below. These are calculated in µg/L, at 10ºC, from pH 5.7 to pH 9.2.


	Water Quality Ambient Water Quality Guidelines for Chlorophenols GUIDELINES FOR WATER The level of chlorophenols in the water in which fish live, should not exceed the guidelines given below. 0.1 µg/L monochlorophenols 0.2 µg/L dichlorophenols Guidelines for Fish Muscle (wet weight) The levels of chlorophenols in fish muscle should not exceed the guidelines below. 10 µg/g 2-monochlorophenol 20 µg/g 3-monochlorophenol 40 µg/g 4-monochlorophenol 80 µg/g 2,3-dichlorophenol 0.2 µg/g 2,4-dichlorophenol 20 µg/g 2,5-dichlorophenol 30 µg/g 2,6-dichlorophenol 50 µg/g 2,4,6-trichlorophenol 20 µg/g 2,3,4,5,6-pentachlorophenol Toxicity Guidelines (to protect aquatic life) The recommended toxicity guidelines for the chlorophenols in Table 1.1.2 are in µg/L, calculated for 10C. The temperature conversion factor is 2 for every 10C change in temperature (the value would be multiplied by 2 at 0C and by 0.5 at 20C). The change in the guidelines caused by applying this factor would be small for the normal ambient temperatures found in British Columbia. Correction for different pH levels is more complex; guidelines for pH values in the range pH 5.7 to pH 9.2 were calculated for the chlorophenols and are found in Table 1.1.2. The guidelines for pentachlorophenol are final since they are based on good primary data. The guidelines for the other chlorophenols are based on a ratio with PCP and these should be considered interim guidelines until properly controlled experiments can provide a unified temperature and pH-dependent regression equation for each chlorophenol. The levels of chlorophenols in water containing aquatic life should not exceed the guidelines given below. These are calculated in µg/L, at 10ºC, from pH 5.7 to pH 9.2.