Gibson Island, MD
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2017-2019). 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
Gibson Island serves about 275 people through 197 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 Anne Arundel County, Maryland. EPA system ID: MD0020013; phone on file: 443-790-5373. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 5 ppb from -5 ppb in the period ending 2016. The highest 90th-percentile result EPA holds for Gibson Island is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2019 | 0 (not detected) |
| 2016 | -5 ppb |
Where this result ranks
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. Gibson Island's reported as 0 (not detected) sits at the 25th percentile in Maryland and the 18th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
26 other systems share Anne Arundel County; 13 of them have a higher latest lead result than Gibson Island. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Glen Burnie-Broadneck | 290,606 | 0 (not detected) |
| Crofton-Odenton | 62,986 | 0 (not detected) |
| Fort George G. Meade | 62,234 | 0 (not detected) |
| City Of Annapolis | 35,000 | 6.3 ppb |
| Broad Creek | 26,033 | 0 (not detected) |
| U.S. Naval Academy | 8,700 | 0 (not detected) |
| Maryland American Water--Severn System | 5,447 | 0 (not detected) |
| Md American Water Provinces | 3,886 | 0 (not detected) |
| Lake Village Townhomes | 2,400 | 5.3 ppb |
| Herald Harbor | 2,241 | 0 (not detected) |
Next steps for Millersville, MD
Look up your address in Gibson Island'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 Gibson Island 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.