Table 2.

Exposure assessment for study sites (n = 42).

Characteristic	Exposure
Proximity to pollution sources [n (%)]
Agriculture nearby or adjacent	17 (40.5)
Lawn nearby or adjacent	15 (35.7)
Water-quality measures
pH	7.6 ± 0.9 (5.7–9.7)
Conductivity (μS)	303.3 ± 307.8 (10–1,350)
Dissolved oxygen (mg/L)	6.5 ± 3.4 (1.2–18.3)
Temperature (°C)	21.2 ± 3.6 (12.8–29.1)
Total nitrogen (mg/L)	0.8 ± 0.8 (0.1–5.4)
Total phosphorus (mg/L)	0.2 ± 0.4 (0.004–2.2)

μS, micro-Siemens. Values shown are mean ± SD (range) except where indicated.