Short answer: No measured result is above a legal limit; lithium sits above a screening level. City of the Dalles serves 13,010 residents.
Your water bill or annual water quality report names your actual supplier.
THE DALLES, CITY OF (EPA PWSID OR4100869) delivers surface water to 13,010 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
lead 0.21 µg/L, below the 15 µg/L action level
Lithium 42.1 µg/L, above the 10.0 µg/L EPA health reference level
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
When your results arrive, read them here →
Each card names which The Dalles findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For The Dalles, no regulated PFAS were detected in EPA's 2024 testing; the lead 90th-percentile result was 0.21 µg/L against the 15 µg/L action level. THE DALLES, CITY OF (PWSID OR4100869) has a Purity Score of 100/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
THE DALLES, CITY OF (PWS ID OR4100869) is the public water system on record for The Dalles, Oregon, serving about 13,010 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2023-07-12 to 2026-06-08) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
THE DALLES, CITY OF's most recent lead 90th-percentile result (2026) was 0.21 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for The Dalles holds 31 findings: 1 above a reference, 1 detected within the reference and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 42.1 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Lead (90th percentile) | 0.21 µg/L | 15 µg/L federal action level | Below the listed reference | 2026–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: THE DALLES, CITY OF (OR4100869) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-15 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-15 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-15 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-15 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-12 to 2026-06-08 | UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869) |
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: THE DALLES, CITY OF (OR4100869)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: THE DALLES, CITY OF (OR4100869)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where City of the Dalles reported something related, it's shown below.
Lead at City of the Dalles: 0.21 µg/L (90th percentile, 2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.