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.
Tracy Water Users Corp
MT0000345 · Groundwater · 200 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, 2017 to Dec 31, 2019
Violation history (1)
Imported violation history for Tracy Water Users Corp| Rule | Status | Period |
|---|
| Lead and Copper Rule | Resolved | Oct 1, 2022 to Aug 14, 2022 |
Sand Coulee Water Users District
MT0000325 · Groundwater · 180 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
20% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (4)
Imported violation history for Sand Coulee Water Users District| Rule | Status | Period |
|---|
| Lead and Copper Rule | Unaddressed | Dec 30, 2024 |
| Consumer Confidence Rule | Unaddressed | Oct 1, 2024 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2024 |
| Groundwater RuleHealth-based | Resolved | Jul 1, 2023 to Sep 18, 2023 |
Big Stone Colony Inc
MT0003077 · Groundwater · 130 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
7% of the listed benchmark
Monitoring period: Jan 1, 2011 to Dec 31, 2019
Violation history (1)
Imported violation history for Big Stone Colony Inc| Rule | Status | Period |
|---|
| E. COLI | Resolved | May 21, 2024 to Jun 12, 2024 |
Grassland Colony
MT0004832 · Groundwater · 80 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 (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.