Kennewick Water Quality
Washington
According to EPA SDWIS, Kennewick, Washington is served by 14 community water systems covering about 126,244 people. The same extract lists 92 health-based violation records, most recently coded 1040 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Kennewick, Washington is delivered through 14 EPA-regulated community water systems serving an estimated 126,244 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 92 violation records across the 14 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: Nitrate, Arsenic, TTHM, Total Haloacetic Acids (HAA5). 3 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 Washington 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 |
|---|---|---|---|
| KENNEWICK CITY OF | 118,164 | 0 | Clean |
| BADGER MOUNTAIN IRRIGATION DISTRICT | 2,331 | 24 | Health |
| SUMMIT VIEW WATER SYSTEM | 1,869 | 0 | Clean |
| BC WATER CO | 1,262 | 36 | Health |
| Community Sewer and Water District | 1,200 | 0 | Clean |
| WHITE BLUFF WATER ASSOCIATION | 386 | 0 | Clean |
| HOMESTEAD MANUFACTURED HOUSING | 300 | 2 | Health |
| TRI-CITY WATER DISTRICT #45 | 300 | 0 | Clean |
| PASCO HEIGHTS DOMESTIC WATER ASSN | 135 | 0 | Clean |
| SUNDANCE IMPROVEMENT ASSOCIATION | 100 | 29 | Health |
| EATON PARK SUBDIVISION | 70 | 0 | Clean |
| GOODNIGHT WATER SYSTEM | 47 | 0 | Clean |
| BADGER CANYON WATER ASSN | 40 | 0 | Clean |
| GOOD NEIGHBORS WATER ASSN | 40 | 1 | 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 |
|---|---|---|
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2025-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2025-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2025-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2025-01-01 |
| GOOD NEIGHBORS WATER ASSN | Nitrate | 2025-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-10-01 |
| HOMESTEAD MANUFACTURED HOUSING | Arsenic | 2024-10-01 |
| HOMESTEAD MANUFACTURED HOUSING | Arsenic | 2024-10-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2024-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2024-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2024-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2024-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2024-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-04-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-04-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-04-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | TTHM | 2023-04-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2023-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2023-01-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-10-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| BADGER MOUNTAIN IRRIGATION DISTRICT | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2021-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2021-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2020-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2020-01-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2019-07-01 |
| SUNDANCE IMPROVEMENT ASSOCIATION | Nitrate | 2019-01-01 |
What are Kennewick's health-based records for?
Kennewick's health-based violation records carry 4 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 | 66 | 3 |
| Tthm | 15 | 1 |
| Total Haloacetic Acids (HAA5) | 9 | 1 |
| Arsenic | 2 | 1 |
TRI Facilities in Kennewick
| Facility | Total Releases |
|---|---|
| Nutrien US LLC | 4.9M lbs |
| Alleima Special Metals LLC | 950.8K lbs |
| Tessenderlo Kerley Inc. | 35.0K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Kennewick, Washington? ▼
How many water violations does Kennewick have in this EPA extract? ▼
What contaminants were found in Kennewick water? ▼
How many water systems serve Kennewick? ▼
Where does Kennewick get its drinking water? ▼
Are there pollution sources near Kennewick? ▼
How does Kennewick compare in Washington?
Of the 365 Washington places with at least one community water system on file, Kennewick ranks #36 by number of systems (14).
Either side of it: Raymond (15), Walla Walla (15), Cashmere (13), Chehalis (13)
About This Data
Figures here are the current EPA SDWIS extract joined to the 14 community water systems whose service area lists Kennewick, ranked against the 365 Washington 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.