TABLE 3.

Water quality and bacterial indicator data for the 100-liter SW samples^a

SW sample no.	Water quality parameters						Bacterial indicators (log10 MPN/100 ml)						% RE
	pH	Conductivity (μS/cm)	Turbidity (NTU)	DO (mg/liter)	Nitrate (mg/liter)	Ammonium (mg/liter)	Before UF			After UF
							TC	EC	Entero	TC	EC	Entero	TC	EC	Entero
1	8.11	91		10.16	0.432	0.141	3.19	1.75	1.24	5.38	3.71	3.08	50.5	29.9	22.7
2	7.19	82	3.1	10.61	0.219	0.137	3.54	1.49	1.30	5.79	3.74	3.93	>100	>100	>100
3	7.67	93	7.5	10.79	0.271	0.191	3.24	1.80	2.12	5.99	4.01	4.56	>100	38.5	66.2
4	7.69	89	5.8	11.17	0.179	0.187	3.71	1.00	1.88	5.84	3.59	3.88	66.4	>100	50.0
5	7.41	48	2.7	10.38	0.416	0.119	3.27	1.30	1.30	5.91	4.14	4.77	79.9	>100	>100
6b	7.77	96	9.6	11.18	0.399	0.120	3.66	1.87	2.62	5.59	3.67	3.64	97.2	72.7	12.2
7	7.80	49	6.6	11.41	0.391	0.120	3.39	1.55	1.38	5.89	3.88	3.71	95.9	65.0	65.1
8	6.58	81	4.2	11.84	0.270	0.125	No test	No test	1.49	5.30	3.80	3.38			>100
9c	6.71	38	3.1	13.49	0.087	0.048	1.16	0.30		>4.38	2.72	2.36	>100	55.0
10c	6.95	47	1.3	13.33	0.044	0.054	2.02	0.80	0.00	4.42	3.13	3.10	48.5	41.7	>100
11	7.20	238	73.7	10.53	1.71	0.336	3.00	2.08	1.72	5.91	4.34	4.09	>100	24.1	31.2

^aAbbreviations: NTU, nephelometric turbidity unit; DO, dissolved oxygen; TC, total coliforms; EC, E. coli; Entero, enterococci; RE, recovery efficiency.

^bThe elution step was not completed on this sample.

^cUpstream surface water sample.