Summary Table of Risk Estimates for THMs in Surface Water

 

 

Compound

 

 

Chloroform

Bromodichloromethane

Chlorodibromomethane

Bromoform

Total Risk

Water Concentrationa µg L-1

 

90

12

5

2.1

 

 

Unit Dose Factor

Potencies by Route

 

 

 

Ingestion

0.0086

0.031

0.13

0.094

0.008

 

Inhalation

0.019

0.019

0.13

0.094

0.004

 

Dermal uptake

0.0024

0.019

0.13

0.094

0.004

 

Total risk by chemical

 

6.1 × 10-5

4.7 × 10-5

1.4 × 10-5

3.2 × 10-7

1.2 × 10-4

a Data from Brass and others (1981).

Summary Table of Risk Estimates for THMs in Ground Water

 

 

Compound

 

 

Chloroform

Bromodichloromethane

Chlorodibromomethane

Bromoform

Total Risk

Water Concentrationa µg L-1

 

8.9

5.8

6.6

11

 

 

Unit Dose Factor

Potencies by Route

 

 

 

Ingestion

0.0086

0.031

0.13

0.094

0.008

 

Inhalation

0.019

0.019

0.13

0.094

0.004

 

Dermal uptake

0.0024

0.019

0.13

0.094

0.004

 

Total risk by chemical

 

6.0 × 10-6

2.3 × 10-5

1.9 × 10-5

1.7 × 10-6

4.9 × 10-5

a Data from Brass and others (1981).



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