Knobley Water System, WV
Lead detected, under the action levels
Latest 90th-percentile lead: 6.3 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.
Knobley Water System at a glance
Knobley Water System serves about 132 people through 54 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mineral County, West Virginia. EPA system ID: WV3302946; phone on file: 301-697-9467. 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 1.5 ppb from 4.8 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Knobley Water System is 8.1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 6.3 ppb |
| 2022 | 4.8 ppb |
| 2019 | 8.1 ppb |
| 2016 | 7.9 ppb |
Against other West Virginia systems
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. Knobley Water System's 6.3 ppb sits at the 95th percentile in West Virginia and the 94th nationally (higher means more lead).
Other water systems in Mineral County
9 other systems share Mineral County; 1 of them has a higher latest lead result than Knobley Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Frankfort Psd | 6,747 | 0.98 ppb |
| Keyser City Of | 4,796 | 1.7 ppb |
| New Creek Water Association | 3,163 | 3.7 ppb |
| Frankfort Psd Wiley Ford | 1,062 | 1.3 ppb |
| Fountain Psd | 1,001 | 4.3 ppb |
| Carpendale, Town Of | 937 | 2.6 ppb |
| Piedmont Municipal Wtr Wks | 847 | 9.7 ppb |
| Fountain Psd Burlington | 793 | 1.5 ppb |
| Ridgeley, Town Of | 737 | 0.1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Keyser, 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 Knobley 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Systems that went over once often dip back under; here is what that means.