Grasonville, MD
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Grasonville serves about 600 people through 255 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 Queen Anne'S County, Maryland. EPA system ID: MD0170020; phone on file: 410-643-3535. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Grasonville is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | -5 ppb |
Against other Maryland systems
Of the 437 Maryland systems with a lead result, the median latest reading is 0 ppb; 3 are over 15 ppb right now and 21 have gone over at some point. Grasonville's reported as 0 (not detected) sits at the 33rd percentile in Maryland and the 23rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
15 other systems share Queen Anne'S County; 3 of them have a higher latest lead result than Grasonville. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Stevensville | 9,155 | 0 (not detected) |
| Town Of Centreville | 3,322 | 5 ppb |
| Bayside-Queenslanding | 1,030 | - |
| Prospect Bay | 913 | 0 (not detected) |
| Town Of Queenstown | 705 | 0 (not detected) |
| Oyster Cove | 600 | 0 (not detected) |
| Bridge Pointe-Kent Island Village | 600 | - |
| Town Of Sudlersville | 497 | 0 (not detected) |
| Beach Harbor | 481 | 0 (not detected) |
| Pine Springs Mhp | 160 | 0 (not detected) |
Your move
Look up your address in Grasonville's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Grasonville 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. Small systems behave differently: why small systems go over more often.