Caldwell Water Quality
Idaho
The tap water in Caldwell, Idaho is served by 21 EPA-regulated water systems covering approximately 77,542 people. 116 health-based violations are on record, most recently for 1040 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Caldwell, Idaho is delivered through 21 EPA-regulated community water systems serving an estimated 77,542 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Caldwell shows 116 total violations across all 21 systems, of which 116 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 1040, 8000, 4006, 1005, 3100 and 1 others. 11 TRI-reporting industrial facilities are also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Idaho drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CALDWELL CITY OF | 74,000 | 0 | Clean |
| CALDWELL HOUSING AUTHORITY | 1,100 | 0 | Clean |
| EL RANCHO HEIGHTS | 300 | 0 | Clean |
| WOODVIEW ACRES PROPERTY OWNERS | 245 | 0 | Clean |
| KARCHER RANCHETTE WATER CORP | 213 | 2 | Health |
| SOMERSET WEST WATER CORP | 203 | 2 | Health |
| OWYHEE VILLAGE SUBD WATER ASSN INC | 200 | 3 | Health |
| DRAKE SUBD | 150 | 62 | Health |
| RIO VISTA WATER COMPANY 3 | 140 | 0 | Clean |
| PAR ESTATES HOMEOWNERS ASSN | 140 | 0 | Clean |
| GEM STATE ACADEMY | 121 | 6 | Health |
| COUNTRY CLUB SUBDIVISIONS WATER ASSN | 120 | 2 | Health |
| PLEASANT VIEW MANOR | 100 | 0 | Clean |
| IDAHO YOUTH RANCH HANDS OF PROMISE | 95 | 21 | Health |
| MAVERICK SUBD LASHER CONSTRUCTION | 90 | 4 | Health |
| STECHER WATER USERS ASSN | 70 | 0 | Clean |
| STECHER MUTUAL WATER COMPANY | 62 | 0 | Clean |
| RICH SUBD | 60 | 3 | Health |
| VANAL HEIGHTS WELL ASSN | 48 | 7 | Health |
| VANAL HEIGHTS SWEET WATER | 45 | 0 | Clean |
| WILDROSE ESTATES | 40 | 4 | Health |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 1040 | 2025-04-01 |
| 1040 | 2025-04-01 |
| 1040 | 2024-01-01 |
| 1040 | 2024-01-01 |
| 1040 | 2024-01-01 |
| 1040 | 2024-01-01 |
| 1040 | 2024-01-01 |
| 8000 | 2023-12-01 |
| 4006 | 2023-07-01 |
| 4006 | 2023-07-01 |
| 4006 | 2023-07-01 |
| 4006 | 2023-07-01 |
| 4006 | 2023-01-01 |
| 4006 | 2023-01-01 |
| 4006 | 2023-01-01 |
| 4006 | 2023-01-01 |
| 4006 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 4006 | 2022-10-01 |
| 4006 | 2022-10-01 |
| 4006 | 2022-10-01 |
| 4006 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-10-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-01-01 |
| 1040 | 2022-01-01 |
| 1040 | 2021-10-01 |
| 1040 | 2021-10-01 |
| 4006 | 2021-07-01 |
| 4006 | 2021-07-01 |
TRI Facilities in Caldwell
| Facility | Total Releases |
|---|---|
| Simplot U.S. Food Group Holdings LLC | 1.4M lbs |
| Best Bath Systems | 715.2K lbs |
| Darigold-Caldwell | 59.8K lbs |
| Icco Middelton | 10.8K lbs |
| Simplot Western Stockmen's | 7.7K lbs |
| Big Tex Trailer Manufacturing Inc-Caldwell | 1.4K lbs |
| Dz Grinders LLC | 26 lbs |
| Maddens Ready Mix | 1 lbs |
| Forterra Structural Specialty Products - Caldwell | 0 lbs |
| Notus Pit | 0 lbs |
Frequently Asked Questions
Is Caldwell, Idaho water safe to drink? ▼
How many water violations does Caldwell have? ▼
What contaminants were found in Caldwell water? ▼
How many water systems serve Caldwell? ▼
Where does Caldwell get its drinking water? ▼
Are there pollution sources near Caldwell? ▼
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.