Riddle Farm, MD
Lead detected, under the action levels
Latest 90th-percentile lead: 1.45 ppb (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. 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 Riddle Farm
Riddle Farm serves about 500 people through 348 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 Worcester County, Maryland. EPA system ID: MD0230019; phone on file: 443-523-6642. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2021 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Riddle Farm is 6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.45 ppb |
| 2021 | 2 ppb |
| 2018 | 6 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. Riddle Farm's 1.45 ppb sits at the 66th percentile in Maryland and the 63rd nationally (higher means more lead).
Other water systems in Worcester County
17 other systems share Worcester County; 8 of them have a higher latest lead result than Riddle Farm. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Town Of Ocean City | 30,000 | 2.8 ppb |
| Ocean Pines | 11,890 | 3.3 ppb |
| Mystic Harbour | 5,945 | 2.3 ppb |
| Town Of Berlin | 4,500 | 4.6 ppb |
| City Of Pocomoke City | 4,100 | 0 (not detected) |
| Town Of Snow Hill | 2,409 | 0 (not detected) |
| Nantucket Point(Distribution-Delaware) | 500 | 2 ppb |
| Newark | 325 | 2.05 ppb |
| Briddletown Distribution System | 150 | - |
| Riverview Mobile Home Park | 150 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Berlin, 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 Riddle Farm 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. The action level is dropping - the 10 ppb rule from 2027.