Tap Water Quality Report
Tap water quality in CORVALLIS, Oregon
Tap water in CORVALLIS, Oregon receives a grade of C (78/100) from TapWaterSafety.org. It's served by CORVALLIS, CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in CORVALLIS's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving CORVALLIS.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 16.2 ppb, 270x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 14.8 ppb, 148x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 21.8 ppb, 145x above the EWG health guideline of 0.15 ppb.
Recommended filters for CORVALLIS
Filters matched to the specific contaminants in CORVALLIS's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in CORVALLIS's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
16.2 ppb | 0.06 | — | — | — | — | — | 270× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
14.8 ppb | 0.1 | 60.0 | 60 | — | — | — | 148× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
21.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 145× over |
| Chromium (hexavalent) Heavy metal |
0.511 ppb | 0.02 | — | — | — | — | — | 26× over |
| Chlorate Disinfection byproduct |
172.6 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Nitrate and nitrite Inorganic |
0.025 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Nitrate Inorganic |
0.0167 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Vanadium Other |
2.09 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
4.18 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.0301 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.762 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CORVALLIS, CITY OF.