Moses Lake Water Quality
Washington
The tap water in Moses Lake, Washington is served by 33 EPA-regulated water systems covering approximately 36,801 people. 118 health-based violations are on record, most recently for 8000 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Moses Lake, Washington is delivered through 33 EPA-regulated community water systems serving an estimated 36,801 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 Moses Lake shows 118 total violations across all 33 systems, of which 118 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 8000, 1040. 9 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 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 |
|---|---|---|---|
| MOSES LAKE CITY OF | 32,428 | 0 | Clean |
| CASCADE VALLEY WATER DISTRICT | 379 | 0 | Clean |
| GOLDEN PLAINS MHP #1 | 360 | 0 | Clean |
| STRATFORD ROAD ESTATES | 312 | 0 | Clean |
| HILLCREST WATER USERS ASSN | 300 | 0 | Clean |
| SKYLINE WATER SYSTEM INC | 293 | 0 | Clean |
| PARKER SPRING ACRES WATER ASSOC | 255 | 27 | Health |
| SUNRISE WATER ASSOCIATION | 250 | 0 | Clean |
| RIDGEVIEW ESTATES WATER ASSOCIATION | 240 | 0 | Clean |
| GROVE TERRACE MHP TWO LLC | 220 | 0 | Clean |
| Saddle Mountain Water Assoc. | 219 | 1 | Health |
| COUNTRY CLUB ESTATES WATER SYSTEM | 186 | 0 | Clean |
| Westshore Water Company | 153 | 0 | Clean |
| SKYLINE ACRES INC | 151 | 0 | Clean |
| HATTON TOWN OF | 105 | 0 | Clean |
| FIRST POTHOLES WATER USERS ASSN | 90 | 0 | Clean |
| Viking Road Water System | 88 | 0 | Clean |
| MARINE VIEW HOME OWNERS ASSN | 87 | 0 | Clean |
| HI LO HOMEOWNERS ASSN | 87 | 0 | Clean |
| SECT 11 DIV 1 Ridgeview Water Assn | 79 | 0 | Clean |
| ADMIRAL WATER USERS ASSN | 74 | 0 | Clean |
| RAINIER TRACTS WATER ASSN | 61 | 0 | Clean |
| SUNSET ACRES WATER ASSN | 61 | 0 | Clean |
| MT VIEW WATER SYSTEM | 42 | 5 | Health |
| Sagedale Apartments | 40 | 0 | Clean |
| SILVER SANDS CONDO WATER | 37 | 0 | Clean |
| SUNRISE ESTATES WATER SYSTEM | 33 | 85 | Health |
| ORCHARD HOMES WATER SYSTEM | 31 | 0 | Clean |
| MAPLES PLAT WATER SYSTEM | 30 | 0 | Clean |
| Desert Hills | 30 | 0 | Clean |
| Lyons Water System | 28 | 0 | Clean |
| SUN DESERT INC | 27 | 0 | Clean |
| PARK ORCHARD TRACT 40 | 25 | 0 | Clean |
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 |
|---|---|
| 8000 | 2025-07-01 |
| 1040 | 2025-07-01 |
| 1040 | 2024-04-01 |
| 1040 | 2024-01-01 |
| 1040 | 2024-01-01 |
| 1040 | 2023-07-01 |
| 1040 | 2023-04-01 |
| 1040 | 2023-04-01 |
| 1040 | 2023-04-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2023-01-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-04-01 |
| 1040 | 2022-01-01 |
| 1040 | 2022-01-01 |
| 1040 | 2022-01-01 |
| 1040 | 2021-01-01 |
| 1040 | 2020-01-01 |
| 1040 | 2020-01-01 |
| 1040 | 2019-04-01 |
| 1040 | 2019-01-01 |
| 1040 | 2019-01-01 |
| 1040 | 2019-01-01 |
| 1040 | 2019-01-01 |
| 1040 | 2019-01-01 |
| 1040 | 2018-07-01 |
| 1040 | 2018-04-01 |
| 1040 | 2018-01-01 |
| 1040 | 2018-01-01 |
| 1040 | 2018-01-01 |
| 1040 | 2018-01-01 |
| 1040 | 2017-10-01 |
| 1040 | 2017-10-01 |
| 1040 | 2017-07-01 |
| 1040 | 2017-04-01 |
| 1040 | 2017-04-01 |
| 1040 | 2017-04-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2017-01-01 |
| 1040 | 2016-10-01 |
TRI Facilities in Moses Lake
| Facility | Total Releases |
|---|---|
| Simplot U.S. Food Group Holdings Llc. | 349.3K lbs |
| Moses Lake Industries Inc | 152.6K lbs |
| Sgl Composites LLC | 118.9K lbs |
| Terex Washington Awp Div Genie Industries | 29.7K lbs |
| D&l Foundry Inc | 18.1K lbs |
| Joyson Safety Systems Acquisition LLC | 17.2K lbs |
| Performix Nutrition Systems LLC | 1.8K lbs |
| Rec Solar Grade Silicon | 385 lbs |
| Boeing A&m Moses Lake | 158 lbs |
Frequently Asked Questions
Is Moses Lake, Washington water safe to drink? ▼
How many water violations does Moses Lake have? ▼
What contaminants were found in Moses Lake water? ▼
How many water systems serve Moses Lake? ▼
Where does Moses Lake get its drinking water? ▼
Are there pollution sources near Moses Lake? ▼
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.