Environment in Ottawa 13 indicators covering environment for Ottawa. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -1.3 Percentage change 2025 up 7.1% 496th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.32 Tonnes of CO2-equivalent 2024 up 3.2% 135th Total and environment-related patents - FUAs — Patent applications 256 Patents 2022 down 11.1% 65th Land surface temperature - Cities and FUAs — Daytime summer land 26.47 Degrees celsius 2024 down 8.2% 1092nd Land surface temperature - Cities and FUAs — Daytime winter land -3.22 Degrees celsius 2024 up 59.2% 1333rd Land surface temperature - Cities and FUAs — Daytime yearly land 17.47 Degrees celsius 2024 down 9.6% 1169th Land surface temperature - Cities and FUAs — Nighttime summer land 15.26 Degrees celsius 2024 up 1.5% 807th Land surface temperature - Cities and FUAs — Nighttime winter land -11 Degrees celsius 2024 up 27.4% 1356th Land surface temperature - Cities and FUAs — Nighttime yearly land 2.63 Degrees celsius 2024 up 614.0% 1334th Air pollution - Cities and FUAs — Population exposure to nitrogen 11.92 Microgrammes per cubic metre 2025 — 951st Air pollution - Cities and FUAs — Population exposure to ozone 50.89 Microgrammes per cubic metre 2025 — 1174th Air pollution - Cities and FUAs — Population exposure to PM10 27.22 Microgrammes per cubic metre 2025 — 1034th Air pollution - Cities and FUAs — Population exposure to PM2.5 7.87 Microgrammes per cubic metre 2025 — 1224th