Window cleaning in Glendora, CA

Homes in Glendora

Glendora has 50,926 people in 19.5 square miles. Median home value is about $862,700.

Wikipedia describes Glendora as nestled in the foothills of the San Gabriel Mountains and says Route 66 runs through the city. It says neighborhoods range from early 20th-century bungalows to modern mansions. Foothill Boulevard is historic Route 66. ZIP codes are 91740 and 91741. I-210 and SR-57 meet in Glendora.

Water in Glendora and what it does to glass

The City of Glendora runs its own water system, with about 8 active wells and roughly 13,500 meters. Its supply comes from groundwater from the Main San Gabriel Basin, filtered surface water from the Metropolitan Water District and filtered surface water from the Covina Irrigating Company. The 2025 report lists groundwater hardness at an average of 190 mg/L, with a range of 120 to 370. The USGS scale calls water more than 180 mg/L as very hard. That puts the 190 mg/L average in the very hard class. The part of the report we could read does not list hardness for the surface-water portion.

Golden State Water Company also appears on lists of Glendora service areas, but we do not know which addresses it serves. As elsewhere, the glass is the best test. Heavy white rings where a sprinkler hits mean mineral deposit. We quote removal from a photo and never add it without asking. The hard-water guide has the details.

Wind, dust and sun

Wikipedia says hot summer temperatures and warm Santa Ana winds in the fall raise wildfire risk in the mountains around Glendora. A 2012 Patch post on a National Weather Service wind advisory for the San Gabriel Valley foothills described gusts up to 50 mph. Neither is a Glendora dust measurement, and we do not claim one. What both support is that foothill cities see fall wind and ash, and glass and panels collect it. A wet rinse with pure water removes ash. Dry wiping scratches.

HOAs, roofs and solar panels

Wikipedia says Glendora's most expensive neighborhoods contain many very large, secluded estate homes. Larger houses often have upper-floor glass. We clean upper windows from the ground with the water-fed pole, at 15 percent more per window for two stories. We found no named master-planned HOA communities for Glendora in our sources, so check your association if you have one. Solar panels on single-story roofs are $6 a panel from the ground. We never walk a roof.

Glendora electric service and solar billing

The City of Glendora's utilities page lists Southern California Edison under utilities. The CPUC says the Net Billing Tariff applies to customers who submit an interconnection application on or after April 15, 2023. Customers on the NEM 2.0 tariff are allowed to remain on it for 20 years from the date they interconnected. For scale, a University of California San Diego study of 186 California sites found that, on average, sites would have yielded 0.81 percent more annual energy if they had been washed halfway through the summer drought. It did not report results for this city, so yours can differ.

Glendora solar permits and private communities

Glendora's code summary says a complete small rooftop solar application meeting the checklist gets a permit within 3 business days, with only one inspection and a possible separate fire inspection. Civil Code 714 voids association rules that effectively ban solar. Wikipedia names North Glendora Private, a private community adjacent to Easley Canyon, but we found no rules for it.

Which of our services fit Glendora

Glendora is 14.8 miles from Ontario, the farthest city on our list. Windows, the solar add-on, holiday lights (about $4 a foot of roofline with the lights included) and TV mounting are all offered here at the same prices as everywhere else. Ask about the neighbor credit when a few homes on a street book together.

Guides worth reading

• Hard-Water Spots on Windows in the Inland Empire
• Holiday Light Installation Cost in the Inland Empire
• Santa Ana Winds, Dust, Windows and Solar Panels

Questions from Glendora homeowners

Sources

1. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Glendora. “50,926... square miles”
2. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Glendora. “$862,700... housing units”
3. Wikipedia, Glendora, California “World-famous Route 66 runs through the city... Glendora is nestled in the foot”
4. Wikipedia, Glendora, California “early 20th-century bungalows”
5. City of Glendora, Consumer Confidence Report page (water sources). “the City of Glendora provides water to customers from three sources: groundwater from the Main San Gabriel Basin filtered surface water from the Metropolitan Water District of Southern California (MWD) filtered surface water from the Covina Irrigating Company (CIC)”
6. City of Glendora, 2025 Consumer Confidence Report (groundwater hardness). “Hardness as CaCO3 (mg/l) NA NA NA 190 120 - 370”
7. USGS Water Science School, "Hardness of water" (classes: soft 0-60, moderately hard 61-120, hard 121-180, very hard over 180 mg/L; hard water and spots on glassware). “more than 180 mg/L as very hard”
8. Wikipedia, Glendora, California “Hot summer temperatures and warm Santa Ana winds in the fall increase the risk of wildfires in the surrounding mountains”
9. Patch, "Wind advisory issued for foothills, San Gabriel Valley," February 16, 2012 (NWS advisory, gusts up to 50 mph). “wind advisory for Santa Ana winds blowing at 20 to 30 mph with gusts up to 50 mph”
10. Wikipedia, Glendora, California “Glendora's most expensive neighborhoods contain many very large, secluded, estate homes”
11. City of Glendora, Utilities page (electric provider). “Southern California Edison”
12. CPUC, Net Billing Tariff “The NBT will apply to customers who submit an interconnection application on or after April 15, 2023”
13. CPUC, NEM page (NEM 2.0 customers stay 20 years from interconnection). “customer-generators are allowed to remain on the NEM 2.0 tariff for 20 years from the date they interconnected”
14. Mejia and Kleissl (2013), "Soiling losses for solar photovoltaic systems in California," Solar Energy (UC San Diego; 186 sites, 2010). “0.81% more annual energy if they had been washed halfway through the summer drought period”
15. Glendora code summary (gocodebook.com), solar permits “permit issued within 3 business days of a complete application meeting the checklist and standard plan. Only one inspection; a separate fire inspection may also be required”
16. California Civil Code section 714 (california.public.law). “effectively prohibits or restricts the installation or use of a solar energy system is void and unenforceable”
17. Wikipedia, Glendora, California “North Glendora Private, a prestigious private community adjacent to Easley Canyon”

Checked 2026-10-31.