These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
City Of Horn Lake
MS0170022 · Groundwater · 13,649 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
8% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Horn Lake Water Association
MS0170010 · Groundwater · 12,735 people served system-wide
A municipal system, in-state city, and served county all agree with this Census ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (2)
Imported violation history for Horn Lake Water Association| Rule | Status | Period |
|---|
| Total Haloacetic Acids (HAA5) | Archived | Oct 1, 2023 to Sep 30, 2024 |
| TTHM | Archived | Oct 1, 2023 to Sep 30, 2024 |
City Of Horn Lake - Twin Lakes
MS0170025 · Groundwater · 1,948 people served system-wide
A municipal system, in-state city, and served county all agree with this Census ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
52% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (4)
Imported violation history for City Of Horn Lake - Twin Lakes| Rule | Status | Period |
|---|
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2024 to Mar 6, 2024 |
| TTHM | Resolved | Jan 1, 2024 to Mar 6, 2024 |
| TTHM | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2023 to Dec 31, 2023 |