# Evaluating the Impact of the COVID-19 Pandemic on Residential Energy Use in Los Angeles
## 2 Materials and Methods
### Feeder and Data Selection
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Feeder**} & \multirow{2}{*}{**Location (ZIP Code) 1**} & \multirow{2}{*}{**Residential Customers**} & \multirow{2}{*}{**Region, WS ICAO Code 2**} & \multicolumn{2}{c}{
\begin{tabular}{c} **Median Income** \\ **(Specific Feeder) 3** \\ \end{tabular} } \\  & & & & & \\ \hline A (primary) & Watts (90059) & 2563 (91.1\%) 4; 5 & LA Basin, KCQT & \$51,635 \\  & & & & (\$15,584) \\ \hline B (primary) & Southeast LA (90037) & 1086 (90.1\%) 4 & LA Basin, KCQT & \$44,965 \\  & & & & (\$37,004) \\ \hline C (primary) & Toluca Lake (91602) & 1214 (96.5\%) 4 & SF Valley, KVNY & \$109,254 \\  & & & & (\$49,039) \\ \hline D (primary) & Burbank (91601) 6 & 1740 (90.0\%) 4; 7 & SF Valley, KBUR & \$72,868 \\  & & & & (\$51,003) \\ \hline E (example) & Central Wilshire (90036) & 1320 (94.6\%) 8 & LA Basin, KCQT & \$117,596 \\  & & & & (\$103,242) \\ \hline F (example) & Downtown (90014) & 0 (0.0\%) 9 & LA Basin, KCQT & N/A \\ \hline NPL & All Los Angeles City & 1.24 M (90.7\%) & Entire city (KCQT, reference) & \$62,142 \\ \hline \hline \end{tabular}  
* Refer to Supplementary Table S1 for additional details. 1 Presented with community name, reference zip/postal code tabulation area (ZCTA) inclusive of served feeder area; note that Los Angeles-Long Beach Census tract codes inclusive of feeder service area are presented in the supplementary extension of this table. 2 Los Angeles (LA) Basin or San Fernando (SF) Valley; NWS weather station (WS), ICAO airport code used for identification; temperature reference and corresponding microclimate region. 3 Median income of service area inclusive ZCTA, and specific feeder service area median income. 4 Feeder service area includes single and multi-family homes, small apartment complexes. 5 Feeder service area includes public housing. 6 This feeder corresponds to a service area bordering North Hollywood (Los Angeles) and Burbank and is served by LADWP. 7 Single and multi-family homes, small apartment complexes near commercial district. 8 Feeder service area includes a large apartment community, low rise with numerous common facilities. 9 Pair of mid-rise buildings mixed retail, mercantile, offices, buildings in LA Jewerly District.  
\end{table} 
Table 1: Summary of sampled feeders including feeder service area and service demographic information. B) in climate zone (CZ) #8 and two (C and D) in CZ #9 [33]. Typically, temperature data would be collected from a weather station in the same CZ. However, the neighborhoods served by Feeders A and B are on the border of CZ #9 and exhibit more similarity with the weather station in CZ #8 than with the closest weather station in CZ #9, which is farther away and on the coast. For this reason, the closest weather station is used for all analyses, regardless of designated CZ. Along with the residential distribution feeder data (listed as primary feeders) used in these analyses, two example feeders are provided for additional context in the discussion section, representing a large apartment complex and a commercial zone. System-wide net power load (NPL) was sourced directly from LADWP. Reported NPL summarizes full system net load (not including customer onsite co-generation) on an hourly basis for 2018 through 2020. All power data was analyzed with ambient temperature data, which was sourced from local National Weather Service (NWS) weather stations via a third party sourcing utility, MesoWest/SynopticLabs [34]. Load data was temporally correlated with weather data interpolated to the nearest hour using Universal Translator 3 (UT Online, Pacific Energy Center, Pacific Gas and Electric Corp., San Francisco, CA, USA) [35] and Easy Data Transform (Oryx Digital Ltd., Swindon, Wiltshire, England, UK) [36] software packages. When city data is not available with respect to COVID-19 caseloads and stay-at-home rates, data scoped at the inclusive Los Angeles County or California state level is used.