Ridgely Water System, TN
Lead detected, under the action levels
Latest 90th-percentile lead: 0.3 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.
About Ridgely Water System
Ridgely Water System serves about 2,059 people through 876 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Lake County, Tennessee. EPA system ID: TN0000579; phone on file: 731-377-1923. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Ridgely Water System is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.3 ppb |
| 2022 | 1 ppb |
| 2019 | 0.5 ppb |
| 2016 | 0.5 ppb |
How Ridgely Water System compares
Of the 453 Tennessee systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 10 have gone over at some point. Ridgely Water System's 0.3 ppb sits at the 6th percentile in Tennessee and the 41st nationally (higher means more lead).
Neighbouring systems
1 other system shares Lake County; 1 of them has a higher latest lead result than Ridgely Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tiptonville Water System | 2,627 | 1.4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Ridgely, TN 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 Ridgely 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.