TABLE 3.

Frequency of Normal and Low (<2500g) Birth Weight and Incidence (per 100 Live Births) of Low Birth Weight by Water Service Category (January 2003 – August 2005)

Water Service Category	Normal Birth Weight (≥2500 g)	Low Birth Weight (<2500 g)	Incidence of Low Birth Weight (95% CI)
LHWA Only	162	6	3.6 (1.3 – 7.6)*
Partial LHWA	204	8	3.8 (1.6 – 7.3)*
No LHWA	1080	95	8.1 (6.6 – 9.8)
TOTAL	1446	109	7.0 (5.80 – 8.4)

^*Indicates estimates that are significantly different (p<0.05) from 8.2%, the national incidence of low birth weight [41]. Although not shown, no zip code in Washington County had an incidence of low birth weight that was significantly greater than the national average.