Mariposa Elementary School
K-12 School in California, CA · 1605 E. D St., Ontario · 91764
At a glance
Mariposa Elementary School is a 56,282-square-foot K-12 school at 1605 E. D St., Ontario in Ontario, California, built in 1967. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 14.0 kBtu/ft² and 49 tCO₂e of greenhouse-gas emissions. That score is higher than 93% of the 2,016 scored K-12 school buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 14.0 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 49 tCO₂e |
| GHG intensity | 0.9 kgCO₂e/ft² |
| Electricity | 218,495 kWh |
| Gross floor area | 56,282 sq ft |
| Source record | california:27470379:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 14.0 kBtu/ft² | 49 tCO₂e |
| 2023 | 100 | ±0 | 12.1 kBtu/ft² | 48 tCO₂e |
| 2022 | 100 | 11.0 kBtu/ft² | 52 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 1605 E. D St., Ontario
- City
- California
- State
- California
- ZIP
- 91764
- Coordinates
- 34.06801, -117.61834
Within ~1 km
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See also: most efficient in California · biggest emitters
How does Mariposa Elementary School compare with other K-12 school buildings in California?
The latest disclosures cover 2,128 K-12 school buildings in California, out of 40,029 buildings citywide. Mariposa Elementary School's ENERGY STAR score of 100 compares with an average of 74 across the 2,016 that report a score; it scores higher than 93% of them. Its site EUI of 14.0 kBtu/ft² is about 60% below the average of 34.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.9 kgCO₂e/ft² is about 56% below the group average of 2.0 kgCO₂e/ft².
At 56,282 sq ft, it is about 56% below the average floor area of 129,123 sq ft for those buildings. It was built in 1967, 9 years earlier than the group's average year built (1976). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².
How has Mariposa Elementary School's energy performance changed over time?
BuildingCensus holds 3 California disclosures for Mariposa Elementary School, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 11.0 kBtu/ft² (2022) to 14.0 kBtu/ft² (2024), an 27% increase. Reported emissions went from 52 tCO₂e to 49 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 100 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In California, 65% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. Mariposa Elementary School's 14.0 kBtu/ft² across 56,282 sq ft works out to about 0.8 billion Btu (231 MWh-equivalent) in 2024. The disclosure also reports 218,495 kWh of electricity for the year.
Which law requires Mariposa Elementary School to report its energy use?
Mariposa Elementary School reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:27470379:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More K-12 school buildings in California
- Garretson Es· 56,281 sq ft · score 13 (D)
- Lincoln Elementary School· 56,277 sq ft · score 96 (A)
- Miller Elementary School· 56,258 sq ft · score 83 (B)
- Dewey Elementary· 56,253 sq ft · score 98 (A)
- Greenfield Middle School· 56,243 sq ft · score 38 (D)
- Sequoia Elementary School· 56,243 sq ft · score 87 (A)
- K-12 School buildings in California· 2,128 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is Mariposa Elementary School's energy grade?
Mariposa Elementary School scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mariposa Elementary School use?
Its 2024 site energy-use intensity was 14.0 kBtu/ft² across 56,282 sq ft, including 218,495 kWh of electricity.
What are Mariposa Elementary School's carbon emissions?
Mariposa Elementary School reported 49 tCO₂e of greenhouse-gas emissions (0.9 kgCO₂e/ft²) for 2024.
Where is Mariposa Elementary School?
Mariposa Elementary School is at 1605 E. D St., Ontario, in Ontario, California 91764. Its coordinates are 34.06801, -117.61834 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is Mariposa Elementary School and when was it built?
Mariposa Elementary School has 56,282 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1967 as its year built. It is classed as K-12 school.
Is Mariposa Elementary School covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Mariposa Elementary School, Ontario, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/mariposa-elementary-school-f836b7e9 (data as of July 9, 2026).