St. Clements Shores, MD
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2023-2025). 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.
About St. Clements Shores
St. Clements Shores serves about 620 people through 228 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 St. Mary'S County, Maryland. EPA system ID: MD0180012; phone on file: 240-925-3139. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St. Clements Shores is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | -2 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. St. Clements Shores's 1 ppb sits at the 58th percentile in Maryland and the 53rd nationally (higher means more lead).
Other water systems in St. Mary'S County
36 other systems share St. Mary'S County; 3 of them have a higher latest lead result than St. Clements Shores. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lexington Park | 43,030 | 0 (not detected) |
| Patuxent Naval Air Station (Navfac-Wash) | 22,000 | 0 (not detected) |
| Town Of Leonardtown | 5,000 | 0 (not detected) |
| Country Lakes | 3,016 | 0 (not detected) |
| Cedar Cove | 2,728 | 0 (not detected) |
| Saint Marys College | 2,200 | 0 (not detected) |
| Wicomico Shores | 1,262 | 0 (not detected) |
| Greenbrier | 1,161 | 0 (not detected) |
| Breton Bay | 1,012 | 0 (not detected) |
| Lord Calvert Trailer Park | 892 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; California, MD 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 St. Clements Shores 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.