Acid Rain
United StatesPhysical EnvironmentAverage acidity of precipitation in the United States. Lower pH values represent greater acidity.
Geosystems: Intro to Physical Geography
A map shows the p H levels of acid rain in the U.S. States like Ohio and Pennsylvania have the lowest p H levels (4.50 to 4.59 p H, black). States like Arizona and Nevada show the highest p H levels (greater than or equals 5.30 p H, light yellow).
4.50–4.59 pH | 4.60–4.69 pH | 4.70–4.79 pH | 4.80–4.89 pH | 4.90–4.99 pH | 5.00–5.09 pH | 5.10–5.19 pH | 5.20–5.29 pH | ≥5.30 pH | Class | Rank | Percent of GDP | Adams | Akutan | Aniakchak | Atka | Bachelor | Baker | Belknap | Black Butte Crater Lava Field | Black Peak | Black Rock Desert | Blue Lake Crater | Buzzard Creek | Carrizozo | Chiginagak | Churchill | Cleveland | Crater Lake | Craters of the Moon | Dana | Davis Lake | Diamond Craters | Dotsero | Edgecumbe | Edziza | Fisher | Fourpeaked | Garibaldi | Glacier Peak | Golden Trout Creek | Great Sitkin | Griggs | Haleakala | Hayes | Hell's Half Acre | Hood | Hoodoo Mountain | Hualalai | Iliamna | Imuruk Lake | Indian Heaven | Iskut-Unuk River Cones | Jefferson | Jordan Craters | Kaguyak | Katmai | Kilauea | Kiska | Korovin | Kupreanof | Lassen Volcanic Center | Little Sitkin | Mageik | Makushin | Mammoth Mountain | Markagunt Plateau | Martin | Mauna Kea | Mauna Loa | Meager | Medicine Lake | Mono Lake Volcanic Field | Mono-Inyo Craters | Nazko | Newberry | Novarupta | Okmok | Pavlof | Rainier | Red Hill | Redoubt | Roundtop | Salton Buttes | San Francisco Volcanic Field | Sand Mountain Field | Seguam | Semisopochnoi | Shasta | Shishaldin | Snowy Mountain | Spurr | St. Helens | St. Paul Island | Takawangha | Tanaga | Three Sisters | Trident | Tseax River Cone | Ubehebe Craters | Ugashik-Peulik | Uinkaret Field | Ukinrek Maars | Veniaminof | Vsevidof | Wapi Lava Field | Wells Gray-Clearwater | West Crater | Westdahl | Wrangell | Yantarni | Yellowstone | Yunaska | Zuni-Bandera | Settled 1750–1850 | Settled by 1750 | Settled by 1910 | |
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| 4.29% | 14.4% | 23.8% | 24.2% | 18.5% | 16.1% | 11.6% | 6.63% | 81.6% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 29.2% | 11.2% | 25.5% | ||||