Aqua Ohio - Marion, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 3.7 ppb (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Aqua Ohio - Marion
Aqua Ohio - Marion serves about 47,102 people through 18,841 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Marion County, Ohio. EPA system ID: OH5100414; phone on file: 740-383-0933. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2020 (3.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Aqua Ohio - Marion is 4.4 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.7 ppb |
| 2020 | 3.8 ppb |
| 2017 | 4.4 ppb |
| 2016 | 3.9 ppb |
| 2016 | 3.9 ppb |
Against other Ohio systems
Of the 1,079 Ohio systems with a lead result, the median latest reading is 0.7 ppb; 1 are over 15 ppb right now and 27 have gone over at some point. Aqua Ohio - Marion's 3.7 ppb sits at the 92nd percentile in Ohio and the 86th nationally (higher means more lead).
Neighbouring systems
1 other system shares Marion County; 0 of them have a higher latest lead result than Aqua Ohio - Marion. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aqua Ohio - La Rue Village Pws | 800 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Marion, OH may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Aqua Ohio - Marion whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.