Is Prosser tap water safe to drink?
- Northwest Benton CCD, WA
- South Benton CCD, WA
- Horse Heaven Hills Plateau CCD, WA
- Prosser
The short answer for Prosser
Prosser tap water has lithium above EPA guidelines at 2.1× the limit (tested December 2024). See the full report with all tested compounds and filter options.
The health risk for Prosser
- 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: December 2024 · Treatment Plant |
21.000 µg/L | 10 µg/L | 110% above limit |
View all tested compounds
Treatment Plant · Tested: December 2024
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium | 21.000 µg/L | 10 µg/L | 110% 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 |
Water utilities serving ZIP 99350
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- PROSSER CITY OFAction advised
Frequently Asked Questions about ZIP 99350 Tap Water
What contaminants are above EPA limits in ZIP 99350?
ZIP 99350 has lithium above EPA health guidelines in the latest available data at 2.1x the EPA guideline. The full table on this page lists every tested compound and its measured level.
Will boiling ZIP 99350 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 99350?
Public records identify PROSSER CITY OF as a primary water system associated with ZIP 99350. Service boundaries can vary by address, so confirm exact service with the utility.
When was ZIP 99350 tap water last tested?
The most recent test date used in this report is December 2024. EnviroClarity last refreshed this page on 2026-05-04.
Where can I find the official water quality report for ZIP 99350?
Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact PROSSER CITY OF or visit their website for the latest official report covering ZIP 99350. The EPA also maintains a national CCR locator.
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Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.