Cottage Grove Water Quality
Oregon
According to EPA SDWIS, Cottage Grove, Oregon is served by 8 community water systems covering about 11,519 people. The same extract lists 203 health-based violation records, most recently coded 0300 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Cottage Grove, Oregon is delivered through 8 EPA-regulated community water systems serving an estimated 11,519 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 203 violation records across the 8 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 9 distinct EPA contaminant codes: Interim Enhanced Surface Water Treatment Rule, LEAD AND COPPER RULE REVISIONS, Groundwater Rule, Total Haloacetic Acids (HAA5), Lead and Copper Rule and 4 others.
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 Oregon 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 |
|---|---|---|---|
| COTTAGE GROVE, CITY OF | 10,879 | 0 | Clean |
| LAMONTAI IMPROVEMENT WTR DIST | 255 | 0 | Clean |
| RIVERSTONE MOBILE HOME PARK | 168 | 6 | Health |
| LONDON WATER CO-OP | 63 | 139 | Health |
| MCKENZIE PALISADES WATER BOARD | 50 | 5 | Health |
| HILLTOP IMPROVEMENT DISTRICT | 45 | 0 | Clean |
| MINT ACRES WATER CO-OP | 35 | 1 | Health |
| SWISSHOME VILLAGE | 24 | 52 | 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 |
|---|---|---|
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-10-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-10-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-09-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-09-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-09-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-09-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-08-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-08-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-06-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-06-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-06-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-06-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-05-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-05-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-04-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-04-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-03-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-03-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-03-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-03-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-02-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-02-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-02-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-02-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-01-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2025-01-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-12-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-11-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-11-01 |
| MINT ACRES WATER CO-OP | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RIVERSTONE MOBILE HOME PARK | Groundwater Rule | 2024-09-01 |
| RIVERSTONE MOBILE HOME PARK | Groundwater Rule | 2024-09-01 |
| RIVERSTONE MOBILE HOME PARK | Groundwater Rule | 2024-09-01 |
| RIVERSTONE MOBILE HOME PARK | Groundwater Rule | 2024-09-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-05-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-05-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-05-01 |
| LONDON WATER CO-OP | Interim Enhanced Surface Water Treatment Rule | 2024-05-01 |
What are Cottage Grove's health-based records for?
Cottage Grove's health-based violation records carry 8 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 |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | 137 | 2 |
| Total Haloacetic Acids (HAA5) | 31 | 1 |
| Tthm | 10 | 1 |
| Groundwater Rule | 6 | 2 |
| Revised Total Coliform Rule | 6 | 2 |
| Surface Water Treatment Rule | 6 | 1 |
| Lead and Copper Rule | 5 | 2 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Cottage Grove, Oregon? ▼
How many water violations does Cottage Grove have in this EPA extract? ▼
What contaminants were found in Cottage Grove water? ▼
How many water systems serve Cottage Grove? ▼
Where does Cottage Grove get its drinking water? ▼
How does Cottage Grove compare in Oregon?
Of the 287 Oregon places with at least one community water system on file, Cottage Grove ranks #20 by number of systems (8).
Either side of it: Pendleton (9), Central Point (8), Hermiston (8), Molalla (8)
About This Data
Figures here are the current EPA SDWIS extract joined to the 8 community water systems whose service area lists Cottage Grove, ranked against the 287 Oregon 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.