## 3 Results and Discussion
### Septic System Density
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Watershed**} & \multicolumn{6}{c}{**Median**} & \multicolumn{6}{c}{**Geometric Mean**} \\ \cline{2-9}  & \multicolumn{2}{c}{_E. coli_} & \multicolumn{2}{c}{**Enterococci**} & \multicolumn{2}{c}{_E. coli_} & \multicolumn{2}{c}{**Enterococci**} \\ \cline{2-9}  & \multicolumn{2}{c}{**Conc**} & **Export** & **Conc** & **Export** & **Conc** & **Export** & **Conc** & **Export** \\ \hline CS1 & 160 & 85 & 105 & 23 & 195 & 60 & 107 & 33 \\  & (105-725) & (5–486) & (26–1088) & (5–479) & (207) & (149) & (330) & (133) \\ CS2 & 71 & 35 & 80 & 18 & 168 & 35 & 92 & 19 \\  & (34–7068) & (1–1744) & (3–3434) & (1–847) & (1992) & (492) & (963) & (238) \\ CS3 & 526 & 47 & 101 & 20 & 410 & 5 & 125 & 2 \\  & (16–12100) & (c–16-1672) & (19–6017) & (c–1–855) & (3367) & (723) & (1702) & (267) \\ SF1 & 67 & 18 & 55 & 11 & 89 & 15 & 64 & 11 \\  & (26–1628) & (1–730) & (5–968) & (1–434) & (449) & (210) & (283) & (122) \\ SF2 & 232 & 26 & 48 & 19 & 229 & 12 & 75 & 3 \\  & (21–5600) & (c–1–2023) & (5–2176) & (c–1–156) & (1743) & (597) & (652) & (64) \\ SF3 & 1203 & 151 & 253 & 66 & 792 & 81 & 603 & 49 \\  & (22–12098) & (c–1–2086) & (133–1210) & (c–1–3634) & (3416) & (602) & (3530) & (1089) \\ CS & 160 & 48 & 96 & 22 & 238 & 21 & 107 & 11 \\  & (16–12100) & (c–1–1744) & (3–6017) & (c–1–855) & (2276) & (524) & (1126) & (217) \\ SF5 & 223 & 41 & 126 & 22 & 245 & 24 & 139 & 12 \\  & (21–12098) & (c–1–2086) & (5–12100) & (c–1–3634) & (2526) & (497) & (2134) & (641) \\ SEW & 170 & 94 & 121 & 39 & 233 & 89 & 115 & 44 \\  & (86–1153) & (7–1117) & (10–657) & (4–879) & (370) & (319) & (219) & (252) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Median and geometric mean concentrations (MPN 100 mL\({}^{-1}\)) and exports (MPN s\({}^{-1}\) ha\({}^{-1}\)) of fecal indicator bacteria for the studied watersheds. For median values, the range is included in parentheses. For geometric mean values, the standard deviation is included in parentheses. Conc = concentration; CS = conventional septic; SF = sand filter; SEW = sewer. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Watershed**} & \multicolumn{2}{c}{**SC**} & \multicolumn{2}{c}{**CI\({}^{-}\)**} & \multicolumn{2}{c}{**DO**} & \multirow{2}{*}{**pH**} & \multicolumn{2}{c}{**Temperature**} & \multicolumn{2}{c}{**ORP**} & \multicolumn{2}{c}{**Turbidity**} & \multicolumn{2}{c}{**Discharge**} \\  & \(\upmu\)S cm\({}^{-1}\) & \(\upmu\)S cm\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) & \(\upmu\)S\({}^{-1}\) \\ \hline CS1 & 152 & 15.7 & 8.5 & 7.3 & 13.3 & \(-\)2.0 & 39 & 3.6 \\  & (119–298) & (12.1–39.9) & (3–15.7) & (6.4–8.8) & (1.6–25.1) & (\(-\)136.8–163.9) & (9–120) & (0.1–10.2) \\ CS2 & 103 & 6.8 & 7.8 & 7.3 & 12.8 & \(-\)24.5 & 13 & 1.4 \\  & (77–1069) & (5.0–30.57) & (3.7–14.3) & (6.6–8.4) & (3.2–3.1) & (118.6–193.5) & (5–66) & (0.1–4.4) \\ CS3 & 418 & 50.9 & 6.3 & 7.3 & 12.4 & \(-\)31.7 & 12 & 2.4 \\  & (105–598) & (10.2–10.0) & (1.3–15.1) & (6.3–8.5) & (1.9–23.6) & (143.2–141.3) & (4–58) & (c-0.1–22.1) \\ SF1 & 189 & 19.0 & 5.9 & 7.1 & 13.8 & \(-\)19.4 & 20 & 1.2 \\  & (75–818) & (4.5–209.7) & (2.9–14.5) & (6.6–8.2) & (2.7–23.9) & (128.8–187.8) & (5–132) & (c-0.1–4.0) \\ SF2 & 174 & 17.7 & 6.0 & 7.2 & 13.7 & \(-\)18.4 & 24 & 0.9 \\  & (98–585) & (13.1–67.2) & (6.1–14.3) & (6.3–8.5) & (3.0–2.2) & (137.0–163.0) & (5–72) & (c-0.1–13.2) \\  & 346 & 48.1 & 5.9 & 7.3 & 13.0 & \(-\)27.0 & 25 & 0.7 \\  & (166–774) & (10.3–186.5) & (1.4–15.8) & (6.5–9.3) & (2.0–23.5) & (154.5–164.3) & (6–122) & (c-0.1–6.3) \\ CS & 152 & 15.7 & 7.5 & 7.3 & 12.9 & \(-\)31.6 & 14 & 2.2 \\  & (77–1069) & (5.0–30.57) & (1.3–15.7) & (6.3–8.8) & (1.6–25.1) & (143.2–193.5) & (4–120) & (c-1.2–2.1) \\ SF & 203 & 21.  
up to approximately 10,000 \(\upmu\)S cm\({}^{-1}\) and 8900 mg L\({}^{-1}\), respectively [49].