Estimated domestic well-supplied population, arsenic concentrations, and monetized burden results in 2017 USD, by the USGS Ground Water Atlas Region
| Ground Water Atlas Region definitiona . | Population (thousands)b . | Estimated distribution of arsenic concentrationsc . | Mean economic burden for all endpoints (millions)f . | |||
|---|---|---|---|---|---|---|
| Median (μg/L) . | 95th percentile (μg/L) . | Percent above 1 μg/Ld . | Percent above 10 μg/Le . | |||
| Region B: CA, NV | 2,889 | 2.9 | 17 | 83 | 13 | $1,080 |
| Region C: AZ, CO, NM, UT | 962 | 1.9 | 24 | 66 | 14 | $369 |
| Region D: KS, MO, NE | 1,312 | 2.6 | 17 | 79 | 12 | $508 |
| Region E: OK, TX | 1,644 | 0.94 | 12 | 48 | 6.5 | $389 |
| Region F: AR, LA, MS | 1,306 | 0.32 | 4.9 | 25 | 1.9 | $137 |
| Region G: AL, FL, GA, SC | 5,188 | 0.18 | 2.8 | 15 | 0.8 | $271 |
| Region H: ID, OR, WA | 2,035 | 1.2 | 9.1 | 57 | 4.2 | $350 |
| Region I: MT, ND, SD, WY | 600 | 0.48 | 9.5 | 34 | 4.7 | $100 |
| Region J: IA, MI, MN, WI | 6,216 | 0.25 | 8.2 | 26 | 4.1 | $991 |
| Region K: IL, IN, KY, OH, TN | 5,947 | 0.37 | 37 | 36 | 12 | $3,640 |
| Region L: DE, MD, NJ, NC, PA, WV | 8,904 | 0.19 | 6.8 | 22 | 3.4 | $1,220 |
| Region M: CT, ME, MA, NH, NY, RI, VT | 4,635 | 0.23 | 22 | 30 | 8.7 | $1,860 |
| Total for contiguous United States | 41,638 | 0.62 | 14 | 35 | 6.3 | $10,900 |
| Ground Water Atlas Region definitiona . | Population (thousands)b . | Estimated distribution of arsenic concentrationsc . | Mean economic burden for all endpoints (millions)f . | |||
|---|---|---|---|---|---|---|
| Median (μg/L) . | 95th percentile (μg/L) . | Percent above 1 μg/Ld . | Percent above 10 μg/Le . | |||
| Region B: CA, NV | 2,889 | 2.9 | 17 | 83 | 13 | $1,080 |
| Region C: AZ, CO, NM, UT | 962 | 1.9 | 24 | 66 | 14 | $369 |
| Region D: KS, MO, NE | 1,312 | 2.6 | 17 | 79 | 12 | $508 |
| Region E: OK, TX | 1,644 | 0.94 | 12 | 48 | 6.5 | $389 |
| Region F: AR, LA, MS | 1,306 | 0.32 | 4.9 | 25 | 1.9 | $137 |
| Region G: AL, FL, GA, SC | 5,188 | 0.18 | 2.8 | 15 | 0.8 | $271 |
| Region H: ID, OR, WA | 2,035 | 1.2 | 9.1 | 57 | 4.2 | $350 |
| Region I: MT, ND, SD, WY | 600 | 0.48 | 9.5 | 34 | 4.7 | $100 |
| Region J: IA, MI, MN, WI | 6,216 | 0.25 | 8.2 | 26 | 4.1 | $991 |
| Region K: IL, IN, KY, OH, TN | 5,947 | 0.37 | 37 | 36 | 12 | $3,640 |
| Region L: DE, MD, NJ, NC, PA, WV | 8,904 | 0.19 | 6.8 | 22 | 3.4 | $1,220 |
| Region M: CT, ME, MA, NH, NY, RI, VT | 4,635 | 0.23 | 22 | 30 | 8.7 | $1,860 |
| Total for contiguous United States | 41,638 | 0.62 | 14 | 35 | 6.3 | $10,900 |
aRegions are defined by states that comprise them. Each state is identified by the two-letter code used by the United States Postal Service. There is no Region A.
bPopulation size data for 2005 from the USGS National Water Information System were used to estimate the domestic well-supplied population (USGS 2005).
cAuthors' estimates based on domestic well arsenic sampling data for 1992–2004 from the USGS National Water-Quality Assessment Program (DeSimone et al. 2009).
d1 μg/L is the minimum reporting level in the National Water-Quality Assessment dataset. This is the smallest concentration that can be reliably measured.
e10 μg/L is the U.S. Environmental Protection Agency's current maximum contaminant level for arsenic in public water systems (U.S. EPA 2001).
fThe ‘all endpoint’ damage total differs from the sum of the cancer and noncancer totals in Table 3, because it is the mean of the overall damage distribution. Rounded to three significant figures.