Hidden Hollow S/D, NC
Lead detected, under the action levels
Latest 90th-percentile lead: 2.4 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.
About Hidden Hollow S/D
Hidden Hollow S/D serves about 123 people through 48 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Wake County, North Carolina. EPA system ID: NC0392324; phone on file: 800-525-7990. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 2.74 ppb from 5.14 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Hidden Hollow S/D is 5.14 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.4 ppb |
| 2022 | 5.14 ppb |
| 2016 | 0 (not detected) |
How Hidden Hollow S/D compares
Of the 1,925 North Carolina systems with a lead result, the median latest reading is 0 ppb; 5 are over 15 ppb right now and 75 have gone over at some point. Hidden Hollow S/D's 2.4 ppb sits at the 86th percentile in North Carolina and the 76th nationally (higher means more lead).
Nearby utilities
298 other systems share Wake County; 49 of them have a higher latest lead result than Hidden Hollow S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Raleigh, City Of | 650,000 | 0 (not detected) |
| Cary, Town Of | 227,300 | 0 (not detected) |
| Apex, Town Of | 83,001 | 0 (not detected) |
| Holly Springs, Town Of | 51,947 | 0 (not detected) |
| Fuquay-Varina, Town Of | 42,954 | 0 (not detected) |
| Bayleaf Master | 16,715 | 0 (not detected) |
| New Light Master | 2,619 | 0 (not detected) |
| Stonehenge S/D | 1,840 | 0 (not detected) |
| Rockbridge S/D | 1,042 | 7.8 ppb |
| Medfield Estates S/D | 772 | 4 ppb |
Next steps for Charlotte, NC
Test your own tap with a certified lab first-draw sample; Charlotte, NC 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 Hidden Hollow S/D 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. Systems that went over once often dip back under; here is what that means.