Table 1 Cumulative cancer risks from drinking water contaminants in community water systems in California
From: Applying a cumulative risk framework to drinking water assessment: a commentary
Cumulative cancer risk | Number of community water systems | Exposed population | Estimated number of lifetime cancer cases | Percent contribution to total drinking water-related lifetime cancer cases |
|---|---|---|---|---|
> 10−3 | 495 | 3,103,996 | 4860 | 31% |
10−4 – 10−3 | 1177 | 28,497,278 | 10,427 | 68% |
10−5 – 10−4 | 435 | 2,598,480 | 149 | 1% |
< 10−5 | 107 | 4,510,325 | 13 | 0.09% |
Total | 38,710,079 | 15,449 |