Holland Water Supply, IA
Exceeded the action level in the past
Latest 90th-percentile lead: 1.7 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. 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.
Holland Water Supply at a glance
Holland Water Supply serves about 270 people through 124 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Grundy County, Iowa. EPA system ID: IA3839052; phone on file: 641-792-7011. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 12.5 ppb from 14.2 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Holland Water Supply is 27.9 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.7 ppb |
| 2020 | 14.2 ppb over 10 |
| 2019 | 1 ppb |
| 2018 | 3.6 ppb |
| 2018 | 6.5 ppb |
| 2017 | 27.9 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. Holland Water Supply's 1.7 ppb sits at the 54th percentile in Iowa and the 66th nationally (higher means more lead).
Neighbouring systems
7 other systems share Grundy County; 4 of them have a higher latest lead result than Holland Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Grundy Center Water Supply | 2,796 | 1.8 ppb |
| Reinbeck Water Supply | 1,662 | 14.8 ppb |
| Dike Water Supply | 1,306 | 1.09 ppb |
| Conrad Water Supply | 1,098 | 4.47 ppb |
| Wellsburg Water Supply | 721 | 0.97 ppb |
| Stout Water Supply | 191 | 4 ppb |
| Beaman Water Supply | 161 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Newton, 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 Holland Water Supply 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. Why an old exceedance still matters: over the limit before, under it now.