Stanwood Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 8 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.
Who runs the water here
Stanwood Water Supply serves about 637 people through 300 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Cedar County, Iowa. EPA system ID: IA1681092; phone on file: 563-379-7861. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 7 ppb from 1 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Stanwood Water Supply is 8 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 8 ppb |
| 2020 | 1 ppb |
| 2017 | 0 (not detected) |
Against other Iowa systems
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. Stanwood Water Supply's 8 ppb sits at the 95th percentile in Iowa and the 96th nationally (higher means more lead).
Nearby utilities
12 other systems share Cedar County; 1 of them has a higher latest lead result than Stanwood Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tipton Water Supply | 3,149 | 1 ppb |
| West Branch Water Works | 2,509 | 3 ppb |
| Durant Water Supply | 1,871 | 6 ppb |
| Clarence Water Supply | 1,039 | 2 ppb |
| Mechanicsville Water Dept | 1,020 | 4 ppb |
| Lowden Water Supply | 807 | 2 ppb |
| West Branch Mhp | 400 | 2 ppb |
| Bennett Waterworks | 347 | 60 ppb |
| Yankee Grove Hoa | 64 | 2 ppb |
| Coach Road Well Association | 60 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Stanwood, 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 Stanwood 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.