Is Ontario tap water safe to drink?
- Brogan CCD, OR
- Dead Ox Flat CCD, OR
- Ontario CCD, OR
- Malheur Junction CCD, OR
- Ontario
The short answer for Ontario
Ontario tap water has lithium above EPA guidelines at 3.5× the limit (tested February 2025). See the full report with all tested compounds and filter options.
The health risk for Ontario
- lithium above limit.
lithium was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.
Here's what actually removes PFAS from your water
The right filter eliminates PFAS at the tap. But not all filters do - and the type you choose matters for your home.
Common pitchers like Brita do not remove PFAS. You need a filter independently certified to NSF P473 (for pitcher filters) or NSF/ANSI 58 (for reverse osmosis systems). All three options below carry the relevant certification.
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium Tested: February 2025 · TP for Snake River & Wells |
34.900 µg/L | 10 µg/L | 249% above limit |
View all tested compounds
TP for Snake River & Wells · Tested: February 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium | 34.900 µg/L | 10 µg/L | 249% above limit |
| PFHxS | <0.003 µg/L | 0.004 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFHxA | <0.003 µg/L | 3 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFBS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFOA | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFOS | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFPeA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
730 Railroad (MAL136) · Tested: Multiple dates
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| Nitrate + Nitrite | 58.100 mg/L | 1E+04 mg/L | 0.6% of limit |
| Arsenic | 0.047 mg/L | 10 mg/L | 0.5% of limit |
| Lithium | 0.042 mg/L | 10 mg/L | 0.4% of limit |
| Chromium | 0.017 mg/L | 100 mg/L | 0.0% of limit |
| Copper | 0.037 mg/L | 1300 mg/L | 0.0% of limit |
| Alkalinity, total | 297.000 mg/L | — | — |
| Aluminum | 0.173 mg/L | — | — |
| Barium | 0.015 mg/L | — | — |
| Boron | 0.073 mg/L | — | — |
| Calcium | 116.000 mg/L | — | — |
| CFC-12 | 0.710 µg/L | — | — |
| Chloride | 43.100 mg/L | — | — |
| cis-1,2-Dichloroethylene | 0.660 µg/L | — | — |
| Cobalt | 0.009 mg/L | — | — |
| Hardness, Ca, Mg | 408.000 mg/L | — | — |
| Iron | 0.100 mg/L | — | — |
| Magnesium | 27.800 mg/L | — | — |
| Manganese | 0.337 mg/L | — | — |
| Nickel | 0.015 mg/L | — | — |
| Oxidation reduction potenti... | 378.000 mV | — | — |
| Potassium | 12.000 mg/L | — | — |
| Silica | 69.000 mg/L | — | — |
| Sodium | 35.400 mg/L | — | — |
| Sulfate | 143.000 mg/L | — | — |
| Tetrachloroethylene | 3.900 µg/L | — | — |
| Total dissolved solids | 642.000 mg/L | — | — |
| Total suspended solids | 2.000 mg/L | — | — |
| Trichloroethylene | 0.630 µg/L | — | — |
| Vanadium | 0.054 mg/L | — | — |
| Zinc | 0.125 mg/L | — | — |
Water utilities serving ZIP 97914
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- ONTARIO, CITY OFAction advised
- 730 Railroad (MAL136) (WQP)No recent federal sampling
Frequently Asked Questions about ZIP 97914 Tap Water
What contaminants are above EPA limits in ZIP 97914?
ZIP 97914 has lithium above EPA health guidelines in the latest available data at 3.5x the EPA guideline. The full table on this page lists every tested compound and its measured level.
Will boiling ZIP 97914 tap water remove lithium?
No. Boiling tap water does not remove lithium. Lithium is a dissolved mineral, so heat does not break it down and evaporation can actually concentrate it. Reverse osmosis (NSF/ANSI 58) is the most reliable at-home option for reducing lithium.
Do basic pitcher filters remove lithium?
Standard pitcher filters are not certified to reduce lithium. Reverse osmosis (NSF/ANSI 58) is the most widely available home option for reducing lithium in drinking water.
Who provides tap water in ZIP 97914?
Public records identify ONTARIO, CITY OF as a primary water system associated with ZIP 97914. Service boundaries can vary by address, so confirm exact service with the utility.
When was ZIP 97914 tap water last tested?
The most recent test date used in this report is February 2025. EnviroClarity last refreshed this page on 2026-05-04.
Where can I find the official water quality report for ZIP 97914?
Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact ONTARIO, CITY OF or visit their website for the latest official report covering ZIP 97914. The EPA also maintains a national CCR locator.
Check another ZIP code
Nearby ZIP reports
Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.