Comparison of coliform contamination in non-municipal waters consumed by the Mennonite versus the non-Mennonite rural populations

Table 3 Association of seasons with water quality and GI health risk

Seasons	Total valid samples (N = 240)	Water quality			GI health risk
Seasons	Total valid samples (N = 240)	Potable (N = 40)	Polluted (N = 200)	P value	No risk (N = 40)	Low risk (N = 87)	High risk (N = 113)	P Value
Seasons				0.055*				0.053*
Fall (%)	60 (25)	16 (40)	44 (22)	0.016**	16 (40)	24 (27.6)	20 (17.7)	0.016***
Winter (%)	42 (17.5)	7 (17.5)	35 (17.5)	1.0**	7 (17.5)	17 (19.5)	18 (15.9)	0.8***
Spring (%)	38 (15.8)	7 (17.5)	31 (15.5)	0.8**	7 (17.5)	14 (16.1)	17 (15)	0.9***
Summer (%)	100 (41.7)	10 (25)	90 (45)	0.019**	10 (25)	32 (36.8)	58 (51.3)	0.008***

Fall september–november, Winter december–february, Spring march–april, Summer may–august, GI gastrointestinal
*P value for overall effect of season in model
**P value comparing percentages of potable vs. polluted samples collected in a specific season against all other seasons
***P value comparing percentages of no risk, low risk and high risk samples collected in a specific season against all other seasons

ISSN: 1347-4715