Window cleaning in Corona, CA

Homes in Corona

Corona has 161,540 people in 39.9 square miles. Median home value is about $746,500.

Wikipedia calls Corona "Circle City" for the three-mile circle of Grand Boulevard, says it is one of the most residential cities in the Inland Empire with a large industrial northern half, and notes it was once called the Lemon Capital of the World. Corona has the ZIP codes 92879 and 92880, among others. Corona's center is 13.3 miles from Ontario.

Water in Corona and what it does to glass

The City of Corona's Department of Water and Power supplies water. Its report for 2025 says about 45.5 percent came from city wells, 49.6 percent from Lake Mathews, which is Colorado River water treated at the city's plants, and 4.9 percent from the State Water Project. The report gives the system-wide average hardness as 146 mg/L, which it says is 8.5 grains per gallon and classes as hard, with a treated range of 7.2 to 290 mg/L.

The sources differ a lot. State Project water averaged 88 mg/L, Colorado River water 288 and raw groundwater 452, which is treated before it reaches you, and the report says hardness can change with demand and season. So Corona water goes from moderately hard to very hard over the year. Spots on glass can come and go for that reason. See the hard-water guide for how to tell mineral spots from dirt.

Wind, dust and sun

Wikipedia says autumn in Corona can be windy because of the Santa Ana winds, which blow in two or three times a year from October to December. It also says summers can pass 100 degrees. The city sits at the upper end of the Santa Ana River canyon. Dust and ash collect on glass after wind events. A wet rinse with pure water takes both off without scratching.

HOAs, roofs and solar panels

Some Corona homes have rooftop solar. For single-story roofs we clean panels from the ground, $6 a panel. We never walk a roof, and we leave second-story arrays alone. Eagle Glen in south Corona has a master association, from listing sites, so we call it a weak source. If you have an association, check its contractor rules.

Corona electric service and solar billing

Most Corona homes are on Southern California Edison. The city's Utilities Department supplies power to about 3.4 percent of Corona. Its rate-change notice counts 1,843 bundled electricity customers. The city's expedited permit page says a separate application and approval from the electric utility for your address is required before starting work. It also says Corona Utilities does not allow a Tesla Backup Switch on its meters. SCE customers: the CPUC says applications since April 15, 2023 take the Net Billing Tariff, and NEM 2.0 customers keep their tariff 20 years from interconnection. Check your bill for the utility name.

Corona solar permits and rights

Corona's expedited residential solar permit uses an application form, eligibility checklist, standard plan and structural criteria form. Corona's solar permit also needs a roof plan and spec sheets for all installed items. The completed package and all attachments may be submitted electronically through the city's electronic permit portal, eTRAKiT. Civil Code 714 voids association rules that effectively ban solar. Wikipedia's list of Corona specific plans includes Eagle Glen and Corona Hills, but we found no association rules for either.

Which of our services fit Corona

Corona is near the edge of our service area. If a neighbor sent you, ask about the neighbor credit. Windows on a plan are the usual start. Holiday lights run mid-November to mid-December, about $4 a foot of roofline with the lights included. TV mounting starts at $99.

Guides worth reading

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

Questions from Corona homeowners

Sources

1. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Corona. “161,540... square miles”
2. U.S. Census Bureau, American Community Survey, latest release shown by Census Reporter, for Corona. “$746,500... housing units”
3. Wikipedia, Corona, California “is known as the 'Circle City'”
4. Wikipedia, Corona, California “It is one of the most residential cities in the Inland Empire, but also has a large industrial portion on the northern half”
5. Wikipedia, Corona, California “The town of Corona was once the 'Lemon Capital of the World'”
6. City of Corona Department of Water and Power, Consumer Confidence Report 2026 for the year 2025 (supply and hardness). “provided 45.5%, 49.6% came through Lake Mathews from the Colorado River, and 4.9% was from the State Water Project”
7. City of Corona Department of Water and Power, Consumer Confidence Report 2026 for the year 2025 (supply and hardness). “Our average hardness in the system is 146 ppm or 8.5 grains per gallon, which is classified as hard”
8. City of Corona Department of Water and Power, Consumer Confidence Report 2026 for the year 2025 (supply and hardness). “Range 82 - 94 279 - 298 290 - 570 7.2 - 290 Average 88 288 452 146”
9. City of Corona Department of Water and Power, Consumer Confidence Report 2026 for the year 2025 (supply and hardness). “Our water hardness can change depending on the water demand and the season”
10. Wikipedia, Corona, California “blowing in two or three times a year from October to December”
11. City of Corona, rate-change notice (3.4 percent of city; 1,843 customers). “supplies power to approximately 3.4% of the”
12. City of Corona, rate-change notice (3.4 percent of city; 1,843 customers). “1,843 bundled electricity customers”
13. City of Corona, expedited solar permits (SCE and Corona Utilities). “A separate application process and approval from the electric utility authority for your address is required prior to starting work”
14. City of Corona, expedited solar permits (SCE and Corona Utilities). “or similar devices to be attached to the electric service meter”
15. CPUC, Net Energy Metering “Since April 15, 2023, customers applying for interconnection have taken service on the new net billing tariff”
16. CPUC, Net Energy Metering “allowed to remain on the NEM 2.0 tariff for 20 years from the date they interconnected”
17. City of Corona, expedited solar permits (SCE and Corona Utilities). “required forms include the... structural criteria form”
18. City of Corona, expedited solar permits (SCE and Corona Utilities). “the submittal must include attachments of a roof plan and installation/spec sheets for all installed items”
19. City of Corona, expedited solar permits (SCE and Corona Utilities). “may be submitted electronically by visiting the city's electronic permit portal eTRAKiT”
20. 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.