The Center for Rainwater Harvesting

Table 2d Harvested rainwater contaminants by type of roof

 

 

 

 

 

 

 

 

 

Cadmium

Copper

Lead

Zinc

Units Given

Total Coliform

Total PAH's

 

World Health Organization Guidelines

3

2000

10

3,000

ug/L

0

 

 

US EPA Guideline (Maximum Contamination Level)

5

1,300

0

5000

ug/L

0

 

 

 

 

 

 

 

 

 

 

Ref

Roof Type

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Plywood Covered with Roofing Paper & Tar in an industrial area

 

166

11

877

ug/L

 

 

11

2 Tar paper shingled homes w walls painted w lead paint

 

 

151

 

ug/L

 

 

2

Flat Tar Roof Painted with Reflective Fibrous Aluminum in a
industrial area

 

25

10

297

ug/L

 

 

2

Relatively New Anodized Aluminum in an industrial area

 

16

15

101

ug/L

 

 

3

Concrete Tile in an industrial area x8

 

ND

~90

~1,600

ug/L

 

 

5

Tile - Concrete

0.14

11

46

100

mg/m3

 

 

3

Tile - Concrete - in an urban area x8

 

ND

~50

~200

ug/L

 

 

7

Tile

2.1

1,905

172

360

ug/L

 

yes

8

Tile

0.17

225

16

42

mg/L

 

 

6

Tile - Interlocking Clay (from Graph)

0.5

 

325

3000

ug/L

 

 

6

Tile - Flat Clay - (70%) + Zinc Sheets (from Graph)

1.9

 

440

3700

ug/L

 

 

5

Tile/Paint

0.4

304

41

49

mg/m3

 

 

2

Galvanized (rusty) metal in an industrial area

 

20

302

12200

ug/L

 

 

3

Galvanized Iron in an industrial area x 8

 

ND

~100

~3,600

ug/L

 

 

3

Galvanized Iron in an urban area x8

 

ND

~10

~50

ug/L

 

 

6

Galvanized Iron in a residential area

4.3

 

110

7800

ug/L

 

 

12

Galvanized metal x2

 

 

 

 

ug/m2

 

10.4

5

Zinc/Galvanized Metal

1.2

20

58

3,500

mg/m3

 

 

5

Painted/Galvanized Metal

 

 

 

1,300

mg/m3

 

 

2

Weathered Metal Roof in an industrial area x2

 

11

10

1980

ug/L

 

 

5

Other Metal

 

890

13

1,980

mg/m3

 

 

1

Shingles w/ Gutters in a residential area x18

 

15

21

149

ug/L

 

 

9

18 homes in Kentucky (Shingle (most), Tin, Slate and Metal)

0.06

21.73

2.27

0.16

ug/L

66% > 0

 

12

Asphault x2

 

 

 

 

ug/m2

 

7.9

1

Flat Roof in a commercial area x3

 

9

9

330

ug/L

 

 

1

Flat Roof in an industrial area x3

 

6

8

1155

ug/L

 

 

5

Gravel

0.11

7

2

62

mg/m3

 

 

7

Gravel

0.2

140

22

36

ug/L

 

yes

5

Polyester

0.24

534

20

79

mg/m3

 

 

7

Polyester

3.1

6,817

510

2,076

ug/L

 

 

8

Polyester

0.17

225

16

42

mg/L

 

 

6

Slate (from Graph)

0.5

 

1410

2200

ug/L

 

 

10

125 houses in Auckland

 

 

 

 

 

2 median

 

11

7 Asbestos shingled homes w walls painted w lead paint

 

 

259

 

ug/L

 

 

 

 

 

 

 

 

 

 

 

4

Stormwater Runoff - given here for comparison only. 
THIS IS FOR SURFACE WATER NOT ROOF WATER.
2,300 samples taken by the EPA in the US

 

3

140

160

ug/L

 

 

 

References

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Bannerman, R. 1994.

 

 

 

 

 

 

 

 

"Sources of Urban Stormwater Pollutants Defined in Wisconsin."

 

 

 

 

 

 

 

Technical Note #25 from Watershed Protection Techniques.
1(2): 84-85

 

 

 

 

 

 

 

http://www.stormwatercenter.net/Library/Practice/8.pdf

 

 

 

 

 

 

 

2

Good, J.C. 1993.

 

 

 

 

 

 

 

 

"Roof Runoff As a Diffuse Source of Metals and Aquatic Toxicity
in Stormwater." - Washington

 

 

 

 

Technical Note #25 from Watershed Protection Techniques. 1(2): 84-85

 

 

 

 

 

 

 

http://www.stormwatercenter.net/Library/Practice/8.pdf

 

 

 

 

 

 

 

3

Thomas, P.R. and G.R. Greene. 1993.

 

 

 

 

 

 

 

 

"RainWater Quality From Different Roof Catchments."
- Armidale, New South Wales

 

 

 

 

 

Technical Note #25 from Watershed Protection Techniques. 1(2): 84-85

 

 

 

 

 

 

 

http://www.stormwatercenter.net/Library/Practice/8.pdf

 

 

 

 

 

 

 

4

U.S. EPA. 1983.

 

 

 

 

 

 

 

 

Results of the Nationwide Urban Runoff Program.

 

 

 

 

 

 

 

 

Technical Note #25 from Watershed Protection Techniques. 1(2): 84-85

 

 

 

 

 

 

 

http://www.stormwatercenter.net/Library/Practice/8.pdf

 

 

 

 

 

 

 

5

Jennifer Gadd and Paul Kennedy

 

 

 

 

 

 

 

 

MEDIAN DATA FROM SEVERAL SOURCES -New Zeland

 

 

 

 

 

 

 

 

2nd South Pacific Stormwater Conference, 2001

 

 

 

 

 

 

 

 

http://www.kma.co.nz/downloads/PDFs/Publications/House
%20Roof% 20Runoff%20-%20Gadd,%20Kennedy.pdf

 

 

 

 

 

 

 

6

Gromaire-Mertz, Garnaud, Gonzalez, Chebbo (1999)

 

 

 

 

 

 

 

 

Characterisation of urban runoff pollution in Paris France

 

 

 

 

 

 

 

 

http://www.enpc.fr/cereve/HomePages/mcm/articles/runoff.pdf

 

 

 

 

 

 

7

Boller(1997)

 

 

 

 

 

 

 

 

A first flush analysis (probably Germany).

 

 

 

 

 

 

 

 

2000 Conference on Stormwater and Urban Water Systems Modeling
(Feb 24-25, Toronto, Ontario).

 

 

 

 

 

 

 

 

http://rpitt.eng.ua.edu/Publications/StormwaterTreatability/
pollution%20 prevention%20and%20stormwater.pdf

 

 

 

 

 

 

 

8

Mottier and Boller (1996) Working in Zurich.

 

 

 

 

 

 

 

 

Taken from the 2000 Conference on Stormwater and Urban Water
Systems Modeling (Feb 24-25, Toronto, Ontario).

 

 

 

 

 

 

 

 

http://rpitt.eng.ua.edu/Publications/StormwaterTreatability/
pollution%20 prevention%20and%20stormwater.pdf

 

 

 

 

 

 

 

9

Younos et al,. (1998)

 

 

 

 

 

 

 

 

Virginia Water Resources Research Center

 

 

 

 

 

 

 

 

http://www.vwrrc.vt.edu/pdf/sp3-1998.pdf

 

 

 

 

 

 

 

10

Simmons et al., 2001

 

 

 

 

 

 

 

 

Taken from Jennifer Gadd and Paul Kennedy - House Roof Runoff:
Is it as clean as we think?

 

 

 

 

http://www.kma.co.nz/downloads/PDFs/Publications/House%20
Roof%20Runoff%20-%20Gadd,%20Kennedy.pdf

 

 

 

 

 

 

 

11

Dr. Laura J. Steinberg and Ridgely P. Myers

 

 

 

 

 

 

 

 

Quantifying Urban Non-point Sources of Lead for use in TMDL
Computations - New Orleans

 

 

 

 

http://www.lwrri.lsu.edu/downloads/steinberg_finalFY01.pdf

 

 

 

 

 

 

 

12

P.C. Van Metre, B.J. Mahler

 

 

 

 

 

 

 

 

The contribution of particles washed from rooftops to contaminant loading to urban streams, Austin, Texas

 

 

 

 

 

 

 

 

http://tx.usgs.gov/coring/pubs/rooftops%20Chemosphere.pdf