TRUCKEE MEADOWS WATER AUTHORITY
High Risk3 PFAS compound(s) exceed EPA Maximum Contaminant Levels
This utility has until 2029 to install treatment under the EPA's April 2024 PFAS rule. In the meantime, a point-of-use filter certified NSF/ANSI 58 for PFOA/PFOS provides reliable interim protection.
9
PFAS Detected
3
Above EPA Limits
19
ZIPs Served
Groundwater
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 20.00ppt | 500% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 15.00ppt | 150% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 5.50ppt | 138% of limit
| 4 ppt | ⚠ Exceeds MCL |
lithium | 100000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 13.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 12.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.80ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.70ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.90 ppt | No federal limit |
ZIP Codes Served by This Utility
89431 89433 89434 89436 89439 89441 89501 89502 89503 89506 89508 89509 89511 89512 89519 89521 89523 89557 89595
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About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
NV0000190
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor