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.
Longmont City Of
CO0107485 · Surface water · 104,178 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
11% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (2)
Imported violation history for Longmont City Of| Rule | Status | Period |
|---|
| TTHM | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| Total Haloacetic Acids (HAA5) | Resolved | Jul 1, 2022 to Sep 30, 2022 |
Countryside Of Longmont
CO0107184 · Surface water · 775 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
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (3)
Imported violation history for Countryside Of Longmont| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Dec 31, 2025 to Mar 30, 2026 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Jul 2, 2025 to Jul 29, 2025 |
| TTHM | Resolved | Jul 1, 2022 to Sep 30, 2022 |
St Vrain Mhp Llc
CO0107724 · Surface water · 544 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
0% of the listed benchmark
Monitoring period: Jul 1, 2024 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.