## 3 Results
### Water Efficiency  
Figure 4 shows the boxplot and [PERSON]'s \(\delta\) results in the WE category. According to the boxplot, the range was wide in Certified, Silver, and Gold projects (3-8, 2-9, and 2-8 achieved points, respectively) and narrow in Platinum projects (7-10 achieved points). The median increased from five achieved points in Certified and Silver to six and eight achieved points in Gold and Platinum, respectively. According to [PERSON]'s \(\delta\), the WE category showed low achievement in all four certification levels.  
Table 4 shows median \(\pm\) IQR (25 th-75 th) and [PERSON]'s \(\delta\) results in WE credits. In four certification levels, two of the four WE credits had similar [PERSON]'s \(\delta\) effect sizes between possible and achieved points. Cooling tower water use and Indoor water use reduction credits showed low achievement in  
Figure 4: The boxplot results and [PERSON]’s \(\delta\) effect size between possible and achieved points in the Water Efficiency (WE) category. Effect size is considered to be: very high if \(|\delta|<0.147\) (bold font), high if \(0.147<|\delta|<0.33\) (bold italic font), medium if \(0.33<|\delta|<0.474\) (italic font), and low if \(|\delta|\geq 0.474\) (normal font).  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Credit**} & \multirow{2}{*}{**Possible**} & \multicolumn{4}{c}{**Achieved Points**} \\ \cline{3-6}  & & **Certified** & **Silver** & **Gold** & **Platinum** \\ \hline \multirow{2}{*}{Site assessment} & \multirow{2}{*}{1} & \(0.5\pm 1.0\) & \(1.0\pm 1.0\) & \(1.0\pm 0.0\) & \(1.0\pm 0.0\) \\  & & 0.50 & **0.32** & **0.18** & **0.00** \\ \hline \multirow{2}{*}{Site development–protect or} & \multirow{2}{*}{2} & \(0.0\pm 0.0\) & \(0.0\pm 0.0\) & \(0.0\pm 0.0\) & \(1.0\pm 2.0\) \\  & restore habitat & & 0.91 & 0.86 & 1.00 & 0.60 \\ \hline \multirow{2}{*}{Open space} & \multirow{2}{*}{1} & \(0.0\pm 0.0\) & \(0.5\pm 1.0\) & \(0.0\pm 1.0\) & \(1.0\pm 0.3\) \\  & & 0.77 & 0.50 & 0.55 & **0.20** \\ \hline \multirow{2}{*}{Rainwater management} & \multirow{2}{*}{3} & \(0.0\pm 0.0\) & \(0.0\pm 2.0\) & \(0.0\pm 2.0\) & \(0.0\pm 0.8\) \\  & & 0.86 & 0.77 & 0.82 & 0.80 \\ \hline \multirow{2}{*}{Heat island reduction} & \multirow{2}{*}{2} & \(0.0\pm 2.0\) & \(2.0\pm 2.0\) & \(2.0\pm 0.0\) & \(2.0\pm 0.5\) \\  & & 0.64 & **0.32** & **0.09** & **0.20** \\ \hline \multirow{2}{*}{Light pollution reduction} & \multirow{2}{*}{1} & \(1.0\pm 1.0\) & \(1.0\pm 0.0\) & \(1.0\pm 1.0\) & \(1.0\pm 0.0\) \\  & & _0.41_ & **0.23** & _0.45_ & **0.00** \\ \hline \hline \end{tabular} Notes: Effect size is considered to be: very high if \(|\delta|<0.147\) (bold font), high if \(0.147<|\delta|<0.33\) (bold italic font), medium if \(0.33<|\delta|<0.474\) (italic font), and low if \(|\delta|\geq 0.474\) (normal font).  
\end{table}
Table 3: Credit points achieved for Sustainable Sites (SS) category of LEED-NCv4 projects: median \(\pm\) IQR (25 th–75 th) and [PERSON]’s \(\delta\) effect size between possible and achieved points in a credit.  
all four levels of certification. Cooling tower water use requires the conservation of water used for a cooling tower, and Indoor water use reduction requires installing equipment that allows potable water reduction [5].  
Two other WE credits had different [PERSON]'s \(\delta\) effect sizes between possible and achieved points in different certification levels (Table 4). Water metering and Outdoor water use reduction credits showed medium achievement in Certified, Silver, and Gold projects and very high or high in Platinum projects.