Health Consultation Assessment of Drinking Water Quality And Cancer Incidence Scituate, ma



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Health Consultation


Assessment of Drinking Water Quality
And Cancer Incidence
Scituate, MA
1987-1997

Prepared by:

Massachusetts Department of Public Health Bureau of Environmental Health Assessment Community Assessment Unit

Boston, MA

Under a Cooperative Agreement with:

Public Health Service

Agency for Toxic Substances and Disease Registry US Department of Health and Human Services Atlanta, GA

August 2001


TABLE OF CONTENTS

I. INTRODUCTION.................................................................................................................... 1


II. BACKGROUND...................................................................................................................... 2
III. EVALUATION OF ENVIRONMENTAL CONCERNS........................................................ 2
A. MUNICIPAL WATER SUPPLY................................................................................................................ 4

1. Surface Water Supply ..................................................................................................................... 5

2. Groundwater Well Water Supply.................................................................................................... 6

3. Water Main Pipes ........................................................................................................................... 9
B. MDEP 21E SITES.............................................................................................................................. 11
IV. EXPOSURE PATHWAY ANALYSIS ................................................................................. 11
A. COMPLETED EXPOSURE PATHWAYS.................................................................................................. 12

1. Municipal Water (Scituate Town Hall)......................................................................................... 12

2. Municipal Water Supply (Town-Wide) ......................................................................................... 13

3. Municipal Water Mains................................................................................................................ 14
B. POTENTIAL EXPOSURE PATHWAYS ................................................................................................... 14

1. Municipal Water (Scituate Town Hall)......................................................................................... 14

2. Municipal Water Supply (Town-wide).......................................................................................... 15
C. ELIMINATED EXPOSURE PATHWAYS ................................................................................................. 15

1. Municipal Water (Scituate Town Hall)......................................................................................... 15
V. EVALUATION OF CANCER INCIDENCE IN SCITUATE............................................... 16
A. METHODS FOR ANALYZING CANCER INCIDENCE DATA .................................................................... 16
B. RESULTS OF CANCER INCIDENCE ANALYSIS ..................................................................................... 18

1. Cancer Incidence in Scituate as a Whole (Table 4)...................................................................... 18

2. Cancer Incidence in Census Tract 5051.01 (Table 5) .................................................................. 19

3. Cancer Incidence in Census Tract 5051.02 (Table 6) ................................................................. 19

4. Cancer Incidence in Census Tract 5052 (Table 7) ....................................................................... 20

5. Geographic Distribution............................................................................................................... 21

6. Evaluation of Cancer Risk Factors............................................................................................... 22
VI. DISCUSSION ........................................................................................................................ 29
VII. CONCLUSIONS.................................................................................................................... 34
VIII. RECOMMENDATIONS.................................................................................................... 36
XII. REFERENCES....................................................................................................................... 36




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