Williamsburg 207 209 And 214, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 0.6 ppb (monitoring period 2025-2025). 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.
Who runs the water here
Williamsburg 207 209 And 214 serves about 70 people through 40 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ozaukee County, Wisconsin. EPA system ID: WI2460147. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 2.35 ppb from 2.95 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Williamsburg 207 209 And 214 is 16.05 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2025 | 2.95 ppb |
| 2025 | 2.95 ppb |
| 2024 | 16.05 ppb over 15 |
| 2021 | 0.81 ppb |
| 2018 | 0.69 ppb |
Against other Wisconsin systems
Of the 947 Wisconsin systems with a lead result, the median latest reading is 1.33 ppb; 6 are over 15 ppb right now and 71 have gone over at some point. Williamsburg 207 209 And 214's 0.6 ppb sits at the 30th percentile in Wisconsin and the 44th nationally (higher means more lead).
Other water systems in Ozaukee County
46 other systems share Ozaukee County; 26 of them have a higher latest lead result than Williamsburg 207 209 And 214. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Port Washington Waterworks | 12,853 | 5.9 ppb |
| Cedarburg L & W Commission | 12,500 | 7.6 ppb |
| Grafton Waterworks | 12,269 | 3.3 ppb |
| Mequon Water Utility | 11,152 | 0.52 ppb |
| Saukville Waterworks | 4,268 | 7.6 ppb |
| Belgium Waterworks | 2,493 | 1.3 ppb |
| Fredonia Waterworks | 2,279 | 0 (not detected) |
| Concordia University | 1,500 | 0.3 ppb |
| Mequon Trail Townhomes | 615 | 0.57 ppb |
| Huntington Park | 600 | 1.02 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Milwaukee, WI 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 Williamsburg 207 209 And 214 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.