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 | Metric tons | D0 Abnormally Dry | D1 Drought - Moderate | D2 Drought - Severe | D3 Drought - Extreme | D4 Drought - Exceptional | 0-5 | 5-10 | 10-20 | 20-40 | 40-80 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4.29% | 14.4% | 23.8% | 24.2% | 18.5% | 16.1% | 11.6% | 6.63% | 81.6% | 20.5% | 18.9% | 14.1% | 20.8% | 24.1% | 25.6% | 39.1% | 40.3% | 37.6% | 1.06% | ||||
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