Chestnut Ridge Water System, WV
Lead detected, under the action levels
Latest 90th-percentile lead: 7.3 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.
Who runs the water here
Chestnut Ridge Water System serves about 104 people through 40 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Berkeley County, West Virginia. EPA system ID: WV3300236; phone on file: 304-274-5803. 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 6.2 ppb from 1.1 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Chestnut Ridge Water System is 7.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7.3 ppb |
| 2022 | 1.1 ppb |
| 2019 | 0 (not detected) |
| 2016 | 2.7 ppb |
How Chestnut Ridge Water System compares
Of the 408 West Virginia systems with a lead result, the median latest reading is 0.9 ppb; 4 are over 15 ppb right now and 20 have gone over at some point. Chestnut Ridge Water System's 7.3 ppb sits at the 96th percentile in West Virginia and the 95th nationally (higher means more lead).
Neighbouring systems
10 other systems share Berkeley County; 0 of them have a higher latest lead result than Chestnut Ridge Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Berkeley County Pswd-Potomac River | 69,372 | 0 (not detected) |
| Martinsburg City Of | 16,250 | 2.55 ppb |
| Woods Home Owners Association 2 | 3,300 | 0 (not detected) |
| Va Medical Center | 2,175 | 0 (not detected) |
| Berkeley Co Pswd-Glenwood Forest | 1,102 | 2 ppb |
| Rocky Glen Manufactured Housing Communit | 861 | 0 (not detected) |
| G And E Mhp | 235 | 1 ppb |
| Wvaw - Valley Water And Sewer-Deerwood | 219 | 3 ppb |
| Springer Run Park Llc | 150 | 3 ppb |
| Judy Lynn Mhp | 53 | 0 (not detected) |
Next steps for Martinsburg, WV
Test your own tap with a certified lab first-draw sample; Martinsburg, WV 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 Chestnut Ridge Water System 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.