Drinking water quality · 2024
· Verified
What's in Toledo, OH tap water
12 contaminants were measured in the Toledo, OH water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 12
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- OH
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Toledo, OH
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Toledo, OH's drinking water comes from surface water, drawn from 1 source.
Source
- IN FROM TOLEDO CITY LAKE ERIE INTAKE
Treatment
- TOLEDO WTP
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based2 violations on record · most recent Mar 2023resolved
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Apr 2014resolved
- Reporting1 violation on record · most recent Jul 20251 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–7.6 ng/LRangeSystem-wide | None set | At or above the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 34.2–45.9 ug/LRangeSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 8.8–14.3 ug/LRangeSystem-wide | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.93–1.15 mg/LRangeSystem-wide | 4 mg/LMCLG | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.96–1.05 mg/LRangeSystem-wide | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–1.66 mg/LRangeSystem-wide | 10 mg/LMCLG | Within the limit |
Physical & aggregate
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.015 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| SodiumA naturally occurring salt component. | 7.47–20.9 mg/LRangeSystem-wide | None set | Detected — no federal limit |
People also ask about Toledo, OH's water
+Is Toledo, OH tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Toledo, OH water utility lists 1 contaminant at or above the federal limit: PFOS. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Toledo, OH tap water?
12 contaminants were measured in Toledo, OH's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 5 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Toledo, OH tap water?
One contaminant in Toledo, OH's 2024 report sits at or above the federal limit: PFOS (1.9× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Toledo, OH tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is PFOS, at 1.9× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Toledo, OH's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Toledo, OH's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.