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 | Class | Rank | Percent | 2.00 - 3.32 | 1.00 - 1.99 | 0.50 - 0.99 | 0.20 - 0.49 | -0.20 - 0.19 | -0.50 - -0.21 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4.29% | 14.4% | 23.8% | 24.2% | 18.5% | 16.1% | 11.6% | 6.63% | 81.6% | 3.69% | 26.2% | 54.6% | 30.5% | 36.3% | 2.60% | |||||||
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