Window cleaning in Covina, CA

Homes in Covina

Covina has 49,888 people in 7 square miles. Median home value is about $718,900.

Wikipedia says Covina sits at the foot of the San Gabriel Mountains at about 560 feet and that housing replaced citrus groves after World War II. The I-10 freeway runs through the city. ZIP codes are 91722, 91723 and 91724. Large employers include IKEA, Walmart and Home Depot.

Water in Covina and what it does to glass

The City of Covina's water utility buys its supply. The 2025 report says the water came mainly from Covina Valley Water Company, which filters surface water from the San Gabriel River, with imported Metropolitan Water District water in some months. The report gives hardness of 230 mg/L on average, with a range of 190 to 280. The table has two source columns and the numbers match what the district reports for its imported water, so we cannot say for sure which column the 230 belongs to. The USGS scale calls water more than 180 mg/L as very hard. That puts the 230 mg/L average in the very hard class.

Parts of Covina may be served by other utilities, and we could not confirm which. For glass, the practical sign is the usual one: white rings at the bottom edge of windows that sprinklers wet. Very hard water leaves more per drop, so rings build faster. Photo-based removal quotes start from about $6 a window on top, and we never add them without asking. See the hard-water guide.

Wind, dust and sun

The regional pattern is Santa Ana winds from October to February. Wind-blown dust and ash are mostly a dirt problem that a wet rinse removes. The I-10 freeway adds road grime we cannot size.

HOAs, roofs and solar panels

If you have panels on a single-story roof, we clean them from the ground: $6 a panel from the ground with pure water. We never walk a roof, and we do not clean second-story roof arrays. We found no master-planned HOA communities named for Covina, so check your own association if you have one.

Covina electric service and solar billing

On the SCE service territory city list, Covina appears. That list is dated 2010. 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.

Covina solar permits and association rules

Covina's building safety page says the city is now accepting SolarAPP+ approved plans for qualifying projects. Civil Code 714 voids association rules that effectively ban solar. We found no named master-planned association in Covina.

Which of our services fit Covina

Covina is 14.6 miles from Ontario, toward the edge of our service area. Windows on a plan are the usual start. For older homes with many windows, type your real window count in the quote tool. Screens and tracks are $3 a window. Holiday lights run mid-November to mid-December, about $4 a foot of roofline with the lights included.

Guides worth reading

• Window Cleaning Cost in the Inland Empire
• Hard-Water Spots on Windows in the Inland Empire
• TV Mounting Cost in the Inland Empire

Questions from Covina homeowners

Sources

1. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Covina. “49,888... square miles”
2. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Covina. “$718,900... housing units”
3. Wikipedia, Covina, California (rainfall). “the citrus groves were increasingly replaced by housing”
4. City of Covina, 2025 Consumer Confidence Report (supply and hardness). “Covina's water supply came primarily from the Covina Valley Water Company, which filters surface water from the San Gabriel River”
5. City of Covina, 2025 Consumer Confidence Report (supply and hardness). “Hardness as CaCO3 (mg/L) NA NA 2025 230 190 - 280”
6. 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”
7. NOAA Technical Memorandum NWS WR-270, "Climate of San Diego" (Santa Ana winds commonly occur October to February; December most frequent). “Santa Ana winds commonly occur between October and February”
8. SCE service territory cities list (2010). “Corona Costa Mesa Covina”
9. CPUC, Net Billing Tariff “The NBT will apply to customers who submit an interconnection application on or after April 15, 2023”
10. 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”
11. 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”
12. City of Covina, Building Safety permit page (SolarAPP+). “the City of Covina is now accepting SolarAPP+ approved plans for qualifying projects”
13. 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”

Checked 2026-10-31.