Twin Arch Mobile Home Park, MD
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Who runs the water here
Twin Arch Mobile Home Park serves about 50 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Carroll County, Maryland. EPA system ID: MD0060218; phone on file: 410-643-7711. They can tell you what your service line is made of and whether they pay to replace it.
Twin Arch Mobile Home Park's lead record
That is up 10.4 ppb from 0.6 ppb in the period ending 2018. The highest 90th-percentile result EPA holds for Twin Arch Mobile Home Park is 11 ppb across 2 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 11 ppb over 10 |
| 2018 | 0.6 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. Twin Arch Mobile Home Park's 11 ppb sits at the 98th percentile in Maryland and the 98th nationally (higher means more lead).
Nearby utilities
22 other systems share Carroll County; 0 of them have a higher latest lead result than Twin Arch Mobile Home Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Westminster | 35,256 | 0 (not detected) |
| Freedom District | 24,867 | 0 (not detected) |
| Town Of Mount Airy | 9,890 | 1.4 ppb |
| City Of Taneytown | 6,750 | 3 ppb |
| Town Of Hampstead | 6,600 | 2 ppb |
| Town Of Manchester | 4,954 | 1.16 ppb |
| Wakefield Valley | 2,436 | 0 (not detected) |
| Town Of New Windsor | 1,732 | 2.8 ppb |
| Springfield Hospital Distribution | 1,500 | - |
| Town Of Union Bridge | 997 | 4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Stevensville, 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 Twin Arch Mobile Home Park 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. This system is in the band the 2027 10 ppb rule changes.