Environment in Portland 13 indicators covering environment for Portland. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly -6.1 Percentage change 2025 down 7.0% 945th Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.44 Tonnes of CO2-equivalent 2024 down 2.2% 99th Total and environment-related patents - FUAs — Patent applications 496.2 Patents 2022 down 31.4% 29th Land surface temperature - Cities and FUAs — Daytime summer land 29.09 Degrees celsius 2024 down 4.6% 805th Land surface temperature - Cities and FUAs — Daytime winter land 6.46 Degrees celsius 2024 up 6.8% 759th Land surface temperature - Cities and FUAs — Daytime yearly land 21.48 Degrees celsius 2024 down 5.0% 676th Land surface temperature - Cities and FUAs — Nighttime summer land 12.69 Degrees celsius 2024 up 7.0% 1190th Land surface temperature - Cities and FUAs — Nighttime winter land -0.4926 Degrees celsius 2024 up 62.6% 802nd Land surface temperature - Cities and FUAs — Nighttime yearly land 6.67 Degrees celsius 2024 up 6.6% 996th Air pollution - Cities and FUAs — Population exposure to nitrogen 16.82 Microgrammes per cubic metre 2025 — 851st Air pollution - Cities and FUAs — Population exposure to ozone 42.49 Microgrammes per cubic metre 2025 — 1296th Air pollution - Cities and FUAs — Population exposure to PM10 27.11 Microgrammes per cubic metre 2025 — 1043rd Air pollution - Cities and FUAs — Population exposure to PM2.5 5.76 Microgrammes per cubic metre 2025 — 1319th