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Table 1 Characteristics of the nine distribution systems under study

From: The assessment of population exposure to chlorination by-products: a study on the influence of the water distribution system

Distribution system

Water source

Flow rate (m3/day)

Number of sub-systems

Particular characteristics

Number of sampling sites

Number of subjectsa

AR

Des Roches Lake.

± 9,000

3

Re-chlorination stations or reservoirs.

3

76 (194)

DE

Montmorency River.

± 33,000

5

Re-chlorination stations or reservoirs.

5

188 (493)

LE

Sept Ponts River.

± 19,000

1

None.

2

91 (249)

QC

St. Charles Lake.

± 145,000

4

Re-chlorination stations or reservoirs.

10

549 (1,457)

STF

St. Lawrence River.

± 69,000

5

Re-chlorination stations or reservoirs.

6

189 (498)

CH

Chaudiere River.

± 13,000

6

Re-chlorination stations or reservoirs.

8

117 (309)

LS

St. Lawrence River.

± 24,000

2

Re-chlorination stations or reservoirs.

5

120 (316)

LZ

St. Lawrence River.

± 11,000

2

Re-chlorination stations or reservoirs

3

44 (112)

SR

St. Lawrence River.

± 10,000

2

Re-chlorination stations or reservoirs.

4

96 (251)

  1. a The number of pregnancy trimesters studied is shown into parenthesis