F0/100
Klamath Falls Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 40,475 residents · Oregon
What's In Klamath Falls's Tap Water?
66
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.005 µg/L | 0.004 µg/L | Over Limit |
vanadium | 26.10 µg/L | — | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 1, 2025 – February 28, 2025Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: October 1, 2024 – November 8, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – July 3, 2023Enforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
KLAMATH FALLS WATER DEPT
Population Served
40,475
Water Source
Groundwater
System ID
OR4100443
Frequently Asked Questions About Klamath Falls Water
Is Klamath Falls tap water safe to drink?
Klamath Falls, Oregon tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 167 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Klamath Falls's water?
Of the 66 contaminants tested in Klamath Falls's water supply, the most notable include PFOS, vanadium. 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Klamath Falls have any water quality violations?
Yes, Klamath Falls has 167 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, Other, MR. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Klamath Falls?
Based on EPA data, using a water filter in Klamath Falls is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Klamath Falls's tap water come from?
Klamath Falls's drinking water is sourced from groundwater and supplied by KLAMATH FALLS WATER DEPT. The system serves approximately 40,475 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Klamath Falls's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Klamath Falls's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Klamath Falls's water compare to other cities in Oregon?
Klamath Falls's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Oregon state page to see how all cities in the state compare.
What should I do if I'm concerned about Klamath Falls's water quality?
If you have concerns about Klamath Falls's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (KLAMATH FALLS WATER DEPT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.