TABLE 4.
Comparison between de facto reuse (DFR) and number of contaminants of emerging concern (CECs) qualitatively detected at drinking water treatment plant (DWTP) intakesa
| No. of Qualitative Detections of CECs at DWTP Intakes | Level of DFR Determined Under Mean Flow in DRINCS | ||||
|---|---|---|---|---|---|
|
| |||||
| Not Impacted | <0.1% | 0.1–1% | 1–5% | >5% | |
|
| |||||
| <10 | — | — | — | — | — |
| 10–20 | 2 | 1 | 2 | 3 | — |
| 20–30 | — | — | 1 | 5 | — |
| 30–40 | — | — | 1 | 2 | 1 |
| >40 | — | — | — | 2 | 2 |
DRINCS—De Facto Reuse in our Nation’s Consumable Supply
a
Values in the table represent the number of DWTPs in each category.
Dashes indicate groundwater locations therefore excluded from calculation.