No, it is not illegal at all to collect rainwater in Ohio. Instead, the local and state government actually pushes people to collect more rainwater, which is not just good for the state/country but for the environment as a whole. That’s the reason why, instead of making such an act illegal, they are offering incentives to the people in the different parts of the country for doing so. Just keep on reading more about it.

Who Decides the Rules for Rainwater Collection?
To begin with, the United States does not have any federal law concerning rainwater harvesting. The authorities decide the regulations in each state. So, a state may allow certain activities, whereas those same activities may be prohibited in another state. In short, Colorado imposes rigorous restrictions, but the states of Texas and North Carolina are very positive about the practice.
However, if you happen to be in Ohio, then it’s going to be fine. We should actually analyze the situation to see what is possible here.
Is It Illegal to Collect Rainwater in Ohio?
Is it illegal? No! Actually, gathering rainwater in Ohio is entirely lawful. However, the usage of that water is what counts.
In case you are utilizing it for non-consumable purposes such as irrigating plants, car washing, or cleaning the house, you do not require any special consent. It is entirely permitted.
Nevertheless, in case you intend to use rainwater for drinking purposes, corresponding health laws must be complied with. The water must be sanitized thoroughly, and the installation must be in accordance with the public health norms of Ohio. Besides that, the limitation of such is only existing for small-scale local use, say, residences having fewer than 25 individuals.
Potable vs Non-Potable Water: Like What’s the Difference?
Let’s keep this simple.
Potable water is one that is fit for human consumption. In case you want to use rainwater for drinking, cooking, or washing your teeth, it is considered as such. The state of Ohio permits it, however, only when the water is treated and health regulations are observed.
Non-potable water is that which is not suitable for human consumption. It can be used for watering the garden, washing, and toilet flushing. Such uses are exempt from the requirement of permits and have lower restrictions.
What Rules Should You Follow in Ohio?
If your intention is to gather rainwater for simple outdoor or cleaning purposes, then everything is fine. You are free to install a rain barrel or a tank and begin the collection process. The only thing necessary is to ensure that your installation is hygienic, covered, and that excess water is not flowing into your neighbor’s yard or the street.
In case the water is intended to be consumed, it is definitely a must to have a reliable system for filtration and treatment. Besides that, if you want to be completely safe, you might also need a license from the Ohio Department of Health.
Besides that, there may be some extra rules in specific counties or cities. To be sure of everything, it is certainly a good idea to get in touch with your local health department.
Are There Any Incentives for Collecting Rainwater in Ohio?
Ohio does not offer any kind of tax relief or cash incentives at the state level for people who collect rainwater. Nevertheless, some local governments or utility companies might provide a few small perks, such as a water bill discount or a program for eco-friendly home upgrades.
You can check with your local officials or do a quick online search to find out what is available in your area.