St. Marks, City Of Water Sys., FL
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11.5 ppb (monitoring period 2023-2023). 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.
St. Marks, City Of Water Sys. at a glance
St. Marks, City Of Water Sys. serves about 285 people through 260 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Wakulla County, Florida. EPA system ID: FL1650630; phone on file: 850-925-6224. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 6.5 ppb from 5 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for St. Marks, City Of Water Sys. is 11.5 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 11.5 ppb over 10 |
| 2020 | 5 ppb |
| 2017 | 4.3 ppb |
How St. Marks, City Of Water Sys. compares
Of the 1,481 Florida systems with a lead result, the median latest reading is 1 ppb; 3 are over 15 ppb right now and 85 have gone over at some point. St. Marks, City Of Water Sys.'s 11.5 ppb sits at the 99th percentile in Florida and the 98th nationally (higher means more lead).
Neighbouring systems
6 other systems share Wakulla County; 0 of them have a higher latest lead result than St. Marks, City Of Water Sys.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Sopchoppy | 12,998 | 2.3 ppb |
| Wakulla Regional (Aka Gulf Coast) | 10,637 | 1 ppb |
| Winco Utilities W/S | 3,153 | 3 ppb |
| Panacea Area Water System | 3,020 | 5.5 ppb |
| Wakulla Water System (Riversink) | 216 | 1.2 ppb |
| Mysterious Waters Subdivision | 117 | 3.5 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; St. Marks, FL 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 St. Marks, City Of Water Sys. 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. This system is in the band the 2027 10 ppb rule changes.