Table 4.
Microbial water quality based on the various coliform counting methods. Values in the parenthesis indicate standard deviations (n = 9).
| BR Site | Fecal Indicator Bacteria (FIB) a | Recreational Microbial Water Quality Assessment b | ||||
|---|---|---|---|---|---|---|
|
E. coli/100 mL Geometric Mean (Std. Dev.) |
Enterococcus spp./100 mL Geometric Mean (Std. Dev.) |
Enterococcus spp. (<33 CFU/100 mL (%)) |
Enterococcus spp. (>157 CFU/100 mL (%)) |
Standardized (95th Percentile c) |
Microbial Water Quality Assessment Category (MAC) | |
| BR1 | 15 (4) | 4 (2) | 100 | 0 | 2 | A |
| BR2 | 69 (18) | 22 (5) | 100 | 0 | 2 | A |
| BR3 | 307 (49) | 544 (85) | 0 | 100 | 13,300 | D |
| BR4 | 149 (25) | 189 (24) | 0 | 89 | 12,900 | D |
| BR5 | 88 (16) | 163 (37) | 0 | 56 | 10,600 | D |
a Determined using the geometric mean of nine samples (n = 9); b Recreational Microbial Water Quality Assessment calculated using Enterococcus spp. data following the NH&MRC “Guidelines for Managing Risks in Recreational Water”; c Calculated using the ranked method (n = 9).