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O. Reg. 457/16: ONTARIO DRINKING WATER QUALITY STANDARDS

filed December 15, 2016 under Safe Drinking Water Act, 2002, S.O. 2002, c. 32

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ontario regulation 457/16

made under the

Safe Drinking Water Act, 2002

Made: December 14, 2016
Filed: December 15, 2016
Published on e-Laws: December 15, 2016
Printed in The Ontario Gazette: December 31, 2016

Amending O. Reg. 169/03

(ONTARIO DRINKING WATER QUALITY STANDARDS)

1. (1) Item 31 of Schedule 2 to Ontario Regulation 169/03 is revoked and the following substituted:

 

31.

Dioxin and Furan

0.000000015 (Total toxic equivalents when compared with 2,3,7,8-TCDD (tetrachlorodibenzo-p-dioxin)) 

 

(2) Schedule 2 to the Regulation is amended by adding the following item:

 

33.1

Ethylbenzene

0.14

 

(3) Item 35.1 of Schedule 2 to the Regulation, as made by section 1 of Ontario Regulation 373/15, is amended by striking out “0.08b” in Column 3 and substituting “0.08 (expressed as a running annual average of quarterly results)”.

(4) Item 45 of Schedule 2 to the Regulation is revoked.

(5) Items 54 and 57 of Schedule 2 to the Regulation are revoked and the following substituted:

 

54.

Selenium

0.05

 

. . . . .

 

57.

Tetrachloroethylene (perchloroethylene)

0.01

 

(6) Schedule 2 to the Regulation is amended by adding the following item:

 

58.1

Toluene

0.06

 

(7) Item 63 of Schedule 2 to the Regulation is revoked and the following substituted:

 

63.

Trihalomethanes

0.100 (expressed as a running annual average of quarterly results)

 

(8) Schedule 2 to the Regulation is amended by adding the following item:

 

66.

Xylenes

0.09

 

(9) The footnotes to Schedule 2 are revoked.

2. Schedule 3 to the Regulation is revoked and the following substituted:

SCHEDULE 3 
RADIOLOGICAL STANDARDS

Table 1
Natural Radionuclides

Item

Radiological Parameter

Standard (expressed as a maximum in becquerels per litre)

1.

Beryllium-7

4000.0

2.

Bismuth -210

70.0

3.

Lead-210

0.1

4.

Polonium-210

0.2

5.

Radium-224

2.0

6.

Radium-226

0.6

7.

Radium-228

0.5

8.

Thorium-228

2.0

9.

Thorium-230

0.4

10.

Thorium-232

0.1

11.

Thorium-234

20.0

12.

Uranium-234

4.0

13.

Uranium-235

4.0

14.

Uranium-238

4.0

 

Table 2
Artificial Radionuclides

Item

Radiological Parameter

Standard (expressed as a maximum in becquerels per litre)

1.

Americium-241

0.2

2.

Antimony-122

50.0

3.

Antimony-124

40.0

4.

Antimony-125

100.0

5.

Barium-140

40.0

6.

Bromine-82

300.0

7.

Calcium-45

200.0

8.

Calcium-47

60.0

9.

Carbon-14

200.0

10.

Cerium-141

100.0

11.

Cerium-144

20.0

12.

Cesium-131

2000.0

13.

Cesium-134

7.0

14.

Cesium-136

50.0

15.

Cesium-137

10.0

16.

Chromium-51

3000.0

17.

Cobalt-57

40.0

18.

Cobalt-58

20.0

19.

Cobalt-60

2.0

20.

Gallium-67

500.0

21.

Gold-198

90.0

22.

Indium-111

400.0

23.

Iodine-125

10.0

24.

Iodine-129

1.0

25.

Iodine-131

6.0

26.

Iron-55

300.0

27.

Iron-59

40.0

28.

Manganese-54

200.0

29.

Mercury-197

400.0

30.

Mercury-203

80.0

31.

Molybdenum-99

70.0

32.

Neptunium-239

100.0

33.

Niobium-95

200.0

34.

Phosphorus-32

50.0

35.

Plutonium-238

0.3

36.

Plutonium-239

0.2

37.

Plutonium-240

0.2

38.

Plutonium-241

10.0

39.

Rhodium-105

300.0

40.

Rubidium-81

3000.0

41.

Rubidium-86

50.0

42.

Ruthenium-103

100.0

43.

Ruthenium-106

10.0

44.

Selenium-75

70.0

45.

Silver-108m

70.0

46.

Silver-110m

50.0

47.

Silver-111

70.0

48.

Sodium-22

50.0

49.

Strontium-85

300.0

50.

Strontium-89

40.0

51.

Strontium-90

5.0

52.

Sulphur-35

500.0

53.

Technetium-99

200.0

54.

Technetium-99m

7000.0

55.

Tellurium-129m

40.0

56.

Tellurium-131m

40.0

57.

Tellurium-132

40.0

58.

Thallium-201

2000.0

59.

Tritium

7000.0

60.

Ytterbium-169

100.0

61.

Yttrium-90

30.0

62.

Yttrium-91

30.0

63.

Zinc-65

40.0

64.

Zirconium-95

100.0

 

Notes:

Radionuclide concentrations that exceed the standard may be tolerated for a short period, as long as the annual average concentrations remain below the standard and the restriction (see immediately below) for multiple radionuclides is met.

Restriction for multiple radionuclides:  Based on International Commission on Radiological Protection (ICRP) Publication 26, if two or more radionuclides are present, the sum of the quotients of the observed concentration in becquerels per litre divided by the respective standard in becquerels per litre for each of the radionuclides detected must be less than or equal to one.

Commencement

3. This Regulation comes into force on the later of July 1, 2017 and the day it is filed.

 

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