Cottage Reserve Corporation, IA
Exceeded the action level in the past
Latest 90th-percentile lead: 2 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Cottage Reserve Corporation at a glance
Cottage Reserve Corporation serves about 198 people through 79 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Johnson County, Iowa. EPA system ID: IA5200801; phone on file: 319-624-2201. 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 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cottage Reserve Corporation is 16 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2 ppb |
| 2020 | 1 ppb |
| 2019 | 3 ppb |
| 2018 | 4 ppb |
| 2017 | 1 ppb |
| 2017 | 4 ppb |
| 2016 | 2 ppb |
| 2016 | 16 ppb over 15 |
Where this result ranks
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Cottage Reserve Corporation's 2 ppb sits at the 60th percentile in Iowa and the 70th nationally (higher means more lead).
Neighbouring systems
74 other systems share Johnson County; 22 of them have a higher latest lead result than Cottage Reserve Corporation. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Iowa City Water Department | 68,753 | 4 ppb |
| University Water System | 47,136 | 0 (not detected) |
| North Liberty Water Supply | 23,276 | 0 (not detected) |
| Coralville Muni Water System | 22,318 | 3 ppb |
| Tiffin Water Supply | 7,577 | 0 (not detected) |
| Solon Water Dept | 3,018 | 7 ppb |
| Lone Tree Muni Water System | 1,357 | 2 ppb |
| Lake Ridge, Incorporated | 1,300 | 0 (not detected) |
| Modern Manor, Inc | 915 | 1 ppb |
| Hills Water Supply | 863 | 2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Solon, IA 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 Cottage Reserve Corporation 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. What a 90th-percentile result does and does not tell you: how to read a lead result. More in what a past exceedance means today.