Caldwell Water Quality
Idaho
According to EPA SDWIS, Caldwell, Idaho is served by 22 community water systems covering about 77,637 people. The same extract lists 118 health-based violation records, most recently coded 8000 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Caldwell, Idaho is delivered through 22 EPA-regulated community water systems serving an estimated 77,637 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.
PlainEnviro's health-based SDWIS extract shows 118 violation records across the 22 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Revised Total Coliform Rule, Nitrate, Combined Uranium, Arsenic, Coliform (TCR) and 1 others. 11 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. 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 | 1 | Health |
| EAST LIZARD BUTTE WATER CORP | 95 | 1 | Health |
| 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?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| PLEASANT VIEW MANOR | Revised Total Coliform Rule | 2025-11-28 |
| DRAKE SUBD | Nitrate | 2025-04-01 |
| DRAKE SUBD | Nitrate | 2025-04-01 |
| DRAKE SUBD | Nitrate | 2024-01-01 |
| DRAKE SUBD | Nitrate | 2024-01-01 |
| DRAKE SUBD | Nitrate | 2024-01-01 |
| DRAKE SUBD | Nitrate | 2024-01-01 |
| DRAKE SUBD | Nitrate | 2024-01-01 |
| COUNTRY CLUB SUBDIVISIONS WATER ASSN | Revised Total Coliform Rule | 2023-12-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-07-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-07-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-07-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-07-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-01-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-01-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-01-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-01-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| DRAKE SUBD | Nitrate | 2023-01-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2022-10-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2022-10-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2022-10-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| DRAKE SUBD | Nitrate | 2022-10-01 |
| MAVERICK SUBD LASHER CONSTRUCTION | Nitrate | 2022-04-01 |
| MAVERICK SUBD LASHER CONSTRUCTION | Nitrate | 2022-04-01 |
| DRAKE SUBD | Nitrate | 2022-04-01 |
| DRAKE SUBD | Nitrate | 2022-04-01 |
| DRAKE SUBD | Nitrate | 2022-04-01 |
| DRAKE SUBD | Nitrate | 2022-01-01 |
| DRAKE SUBD | Nitrate | 2022-01-01 |
| DRAKE SUBD | Nitrate | 2021-10-01 |
| DRAKE SUBD | Nitrate | 2021-10-01 |
| IDAHO YOUTH RANCH HANDS OF PROMISE | Combined Uranium | 2021-07-01 |
What are Caldwell's health-based records for?
Caldwell's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Nitrate | 65 | 2 |
| Combined Uranium | 21 | 1 |
| Groundwater Rule | 20 | 8 |
| Arsenic | 7 | 1 |
| Revised Total Coliform Rule | 3 | 3 |
| Coliform (TCR) | 2 | 2 |
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
What does EPA SDWIS list for drinking water in Caldwell, Idaho? ▼
How many water violations does Caldwell have in this EPA extract? ▼
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? ▼
How does Caldwell compare in Idaho?
Of the 216 Idaho places with at least one community water system on file, Caldwell ranks #6 by number of systems (22).
Either side of it: Idaho Falls (25), Sandpoint (23), Athol (19), Eagle (17)
About This Data
Figures here are the current EPA SDWIS extract joined to the 22 community water systems whose service area lists Caldwell, ranked against the 216 Idaho places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
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.