## 3 Results and Discussion
### Results and Discussion Regarding Hypothesis 2  
Individual data (Table 7) have been analyzed and interpreted. To achieve a better understanding and interpretation of our data, we have applied the CCME equation. We proceeded in accordance with CCME guidelines and calculated the water quality index for all twelve samples, taking into consideration all three data points along with the three seasons: pre-monsoon, monsoon, and post-monsoon. For samples 1, 2, and 10, there were no failed tests or variables. Therefore, we have considered their WQI to be 100, which is the maximum. Table 8 shows the WQI levels for each location. After considering all observations in each location, three samples were found to be of excellent quality, one of good quality, four of fair quality, three of marginal quality, and one of poor quality. In the Karol Bagh area, two samples exhibited excellent quality, one displayed fair quality, and one fell into the marginal quality category. In Okhla Industrial Area, 3 samples fell into fair quality, and one displayed marginal quality. In Nangloi area, one fell into poor quality, one fell into marginal quality, one fell into good quality and one fell into excellent quality. Figure 12 illustrates the water quality index of all twelve samples collected from three locations across three different seasons. Dark green bars represent an excellent WQI, blue indicates good quality, yellow represents fair quality, white signifies marginal quality, and red represents poor water quality. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Sample** & **F1** & **F2** & **F3** & **CCMEWQI** \\ \hline A1 & - & - & - & 100 \\ \hline A2 & - & - & - & 100 \\ \hline A3 & 42.85714 & 38.09524 & 26.60563 & 63.50308 \\ \hline A4 & 35.71429 & 33.33333 & 16.37298 & 70.25188 \\ \hline A5 & 35.71429 & 35.71429 & 30.75409 & 65.85795 \\ \hline A6 & 42.85714 & 38.09524 & 21.41807 & 64.65911 \\ \hline A7 & 35.71429 & 33.33333 & 15.23041 & 70.45489 \\ \hline A8 & 35.71429 & 35.71429 & 27.74351 & 66.7288 \\ \hline A9 & 21.42857 & 16.66667 & 544.4 & 44.15396 \\ \hline A10 & - & - & - & 100 \\ \hline A11 & 64.28571 & 50 & 42.51619 & 46.9567 \\ \hline A12 & 21.42857 & 16.66667 & 4.483514 & 84.11386598 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Calculated values of F1, F2, F3 and CCME WQI. \begin{table}
\begin{tabular}{c c c} \hline \hline
**WQI Value** & **Rating** & **Remarks** \\ \hline
95-100 & Excellent & Water quality is three conditions are very close to natural or designed levels \\ \hline
89-94 & Very Good & Water quality is intact; only one minor threat or deterioration is observed; \\  & & conditions rarely differed from the natural or desirable level. \\ \hline
89-88 & Good & Water quality is protected, with only a minor degree of impairment, and \\  & & conditions rarely depending from desirable level will be indicated. \\ \hline
65-79 & Fair & Water quality is usually protected, but occasionally impaired, and conditions \\  & & which sometimes depart from the desirable level will be included. \\ \hline
45–64 & Marginal & Water quality is frequently impaired and conditions often departing from the desirable level will be included. \\ \hline
10-44 & Poor & Water quality is protected and conditions usually depending from desirable level will be indicated. \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Water quality rating as per CCMEWQI [41]. Karol Bagh, being a residential area, had some water samples, specifically A1 and A2, that demonstrated excellent quality. However, it is concerning that A3 displayed marginal quality and A4 showed fair quality. This finding is somewhat alarming and warrants immediate attention, especially in residential areas, where water is primarily used for drinking and cooking, potentially posing significant health risks. Moving on to the Okhla industrial area, three samples, namely A5, A7, and A8, were determined to be of fair quality, while A6 fell into the marginal quality category.