Nampa Water Quality
Idaho
The tap water in Nampa, Idaho is served by 41 EPA-regulated water systems covering approximately 104,636 people. 84 health-based violations are on record, most recently for 1005 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Nampa, Idaho is delivered through 41 EPA-regulated community water systems serving an estimated 104,636 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 Nampa shows 84 total violations across all 41 systems, of which 84 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 1005, 0700, 4000, 5200, 8000 and 2 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 |
|---|---|---|---|
| NAMPA CITY OF | 100,200 | 0 | Clean |
| SHALIMAR SUBD | 370 | 0 | Clean |
| BELLE AIRE ACRES 2 | 350 | 0 | Clean |
| EVERGREEN MOBILE PARK | 284 | 5 | Health |
| COVERT WATER USERS ASSOCIATION | 250 | 0 | Clean |
| ROLLING HILLS ESTATES WATER COMPANY | 250 | 0 | Clean |
| SUNNYRIDGE 3 WATER CORP | 240 | 0 | Clean |
| INDIAN VILLAGE | 225 | 26 | Health |
| LAKEVIEW HILLS WATER USERS ASSOCIATION | 160 | 0 | Clean |
| CAMELOT WATER ASSN INC | 157 | 0 | Clean |
| CLARK THEURER WATER ASSN | 155 | 3 | Health |
| LEISURE HEIGHTS HOMEOWNERS ASSOCIATION | 142 | 0 | Clean |
| OK WATER ASSN | 140 | 0 | Clean |
| SHAMROCK VILLA WATER ASSN | 130 | 0 | Clean |
| APACHE HEIGHTS SUBDIVISION (2) | 110 | 0 | Clean |
| SKY RANCH ESTATES | 104 | 1 | Health |
| KARCHER ACRES SUBD | 100 | 1 | Health |
| M & T WATER CORP | 100 | 7 | Health |
| NORTHSIDE ESTATES HOA INC | 100 | 0 | Clean |
| VERDE HILLS WATER USERS ASSN INC | 95 | 0 | Clean |
| WESTVIEW SHERVIK SUBD | 78 | 2 | Health |
| MANGUM HEIGHTS SUBD | 75 | 3 | Health |
| VALLEY VIEW WATER | 57 | 2 | Health |
| BURNIE SUBD | 55 | 0 | Clean |
| M AND M MOUNTAIN VIEW SUBD EM2 | 54 | 0 | Clean |
| SUNNYRIDGE PROPERTY OWNERS | 53 | 5 | Health |
| DAHL SUBD | 51 | 0 | Clean |
| LAKERIDGE SECOND SUBD | 50 | 0 | Clean |
| SKYLINE WATER ASSN | 50 | 0 | Clean |
| NORTHSTAR SUBDIVISION | 50 | 6 | Health |
| LINDENWOOD WATER ASSN | 48 | 0 | Clean |
| SILVER SPUR SUBDIVISION | 44 | 0 | Clean |
| LOCUST SUBD | 42 | 4 | Health |
| SHIPMAN PLACE SUBD | 40 | 1 | Health |
| SCENIC PROPERTIES WATER ASSN INC | 40 | 0 | Clean |
| SUNNYRIDGE I SUBD | 35 | 10 | Health |
| COUNTRY MEADOWS SUBD | 35 | 0 | Clean |
| SUNNYRIDGE SUBD 2 | 34 | 0 | Clean |
| AURORA SUBD | 30 | 0 | Clean |
| TWIN BRIDGES SUBD | 28 | 1 | Health |
| RIVERVINE SUBDIVISION | 25 | 7 | 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 |
|---|---|
| 1005 | 2025-07-01 |
| 1005 | 2025-04-01 |
| 1005 | 2025-04-01 |
| 0700 | 2025-02-23 |
| 4000 | 2025-01-01 |
| 1005 | 2025-01-01 |
| 1005 | 2025-01-01 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 4000 | 2024-10-01 |
| 4000 | 2024-10-01 |
| 1005 | 2024-10-01 |
| 1005 | 2024-10-01 |
| 1005 | 2024-07-01 |
| 1005 | 2024-07-01 |
| 1005 | 2024-07-01 |
| 0700 | 2024-05-02 |
| 0700 | 2024-05-02 |
| 1005 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 0700 | 2023-07-26 |
| 0700 | 2023-07-26 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 8000 | 2022-10-22 |
| 8000 | 2022-10-22 |
| 1005 | 2022-07-01 |
| 1005 | 2022-07-01 |
| 1005 | 2022-07-01 |
| 1005 | 2022-07-01 |
| 1005 | 2021-01-01 |
| 1005 | 2021-01-01 |
| 8000 | 2020-10-01 |
| 1005 | 2020-10-01 |
| 1005 | 2020-10-01 |
| 0700 | 2020-07-17 |
TRI Facilities in Nampa
| Facility | Total Releases |
|---|---|
| Amalgamated Sugar Co Nampa | 3.2M lbs |
| Dubois Chemicals Inc. - Nampa Id | 104.9K lbs |
| Sorrento Lactalis Inc. | 29.2K lbs |
| 301931-STEPHENS #2 (nampa) | 986 lbs |
| Performix Nutrition Systems LLC | 969 lbs |
| Oldcastle Infrastructure & Idaho Sand & Gravel | 200 lbs |
| Plexus Manufacturing Solutions (boi) | 138 lbs |
| Idaho Asphalt Supply Inc Nampa Plant | 26 lbs |
| Hart & Cooley | 22 lbs |
| Lippert Components Inc.- Plant 84 | 1 lbs |
Frequently Asked Questions
Is Nampa, Idaho water safe to drink? ▼
How many water violations does Nampa have? ▼
What contaminants were found in Nampa water? ▼
How many water systems serve Nampa? ▼
Where does Nampa get its drinking water? ▼
Are there pollution sources near Nampa? ▼
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.