Triple J Mhp, MD
Above the federal action level
Latest 90th-percentile lead: 18 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. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
About Triple J Mhp
Triple J Mhp serves about 200 people through 90 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lancaster County, Maryland. EPA system ID: PA7360055; phone on file: 410-717-3274. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
The highest 90th-percentile result EPA holds for Triple J Mhp is 18 ppb across 1 monitoring period, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 18 ppb over 15 |
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. Triple J Mhp's 18 ppb sits at the 100th percentile in Maryland and the 99th nationally (higher means more lead).
Other water systems in Lancaster County
1 other system shares Lancaster County; 0 of them have a higher latest lead result than Triple J Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jubilee Mhp | 30 | - |
Your move
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Triple J Mhp 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. Size matters more than most people expect: small vs large water systems.