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The Rainiest U.S. States & Rain Harvesting Solutions

by tabathatidd

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In the modern world, people are more likely to take anything that they can get, even if it’s not of high caliber. They’ll even collect and use rainwater if they have to just to save on their next water bill. There’s not much fresh water to go around, after all; so they settle for the next best thing.

Many parts of the United States receive significant amounts of precipitation all-year round; filling tanks and other storm water systems. With a bit of filtering, rainwater can become potable water for folks to drink or use. Any state in the country can take advantage of rainwater harvesting systems; all the more if the state happens to be one of the wettest in the U.S. Here is a breakdown on some of them, assuming that the basin measures 4,200 square feet.

Hawaii – 63.7 inches (1,618 mm)

Living on an island surrounded by a vast, salty body of water may not be easy; but the tropical state of Hawaii receives a fair amount of rainfall to make up for it. Data from the National Oceanic and Atmospheric Administration (NOAA) reports that Hawaii experiences an average rainfall of 63.7 inches every year. It’s enough to provide two glasses of water for the entire Hawaiian population—with leftovers.

Louisiana – 60.1 inches (1,528 mm)

Sitting along the path of occasional Atlantic cyclones, the state of Louisiana is an ideal place to install a rain harvesting system. Data from the NOAA reports that the Bayou State experiences an average rainfall of 60.1 inches annually. In fact, the same statistics also state that New Orleans is the wettest city in the U.S., with an average of 64.2 inches of rain annually. That translates to a glass of water for nearly three million Louisianans.

Mississippi – 59.0 inches (1,499 mm)

More than an inch short of Louisiana is Mississippi, the former’s neighbor to the right. With an average rainfall of 59 inches every year, Mississippi is also a good place to invest on rainwater collection systems. That amounts to a glass of water for every Mississippian.

If you want to perform more calculations to help you choose a rainwater collection system, you can use the online calculator at this website, For information about rainfall in other states, you can check out the statistics at The results are derived from NOAA reports.

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