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Tap water quality report

Toronto, OH

EPA monitoring detected 18 contaminants across the 1 water supplier serving Toronto. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
5,676
people served
18
contaminants found
Ohio rankings Lead in Ohio PFAS in Ohio

What was found in Toronto's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
1332.5 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Nitrate-Nitrite
1265 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Fluoride
1079 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
TTHM
86.975 µg/L 109%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Copper
54 µg/L 4.2%
of the EPA limit 1300 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2017
1/1 SYR4
Chloroform
46.595 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
34.89 µg/L 58%
of the EPA limit 60 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Barium
32.375 µg/L 1.6%
of the EPA limit 2000 µg/L
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Dibromochloromethane
27.63 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Bromodichloromethane
26.17 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Trichloroacetic Acid
17.81 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Dichloroacetic Acid
13.8 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Bromoform
7.528 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Dibromoacetic Acid
6.975 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.3 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2019
1/1 SYR4
PFBS
0.0035 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2025
1/1 UCMR-5
Pfpea
0.0032 µg/L
No EPA limit set
Main supplier: TORONTO PWS · 5,676 people · 2025
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: TORONTO PWS · 5,676 people · 2025
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Toronto

SupplierPopulation served
TORONTO PWS 5,676

Frequently asked questions about Toronto tap water

Is Toronto tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Toronto. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Toronto?

1 public water supplier report drinking-water monitoring for Toronto, Ohio to the EPA. Each is listed above with its population served.

What contaminants are in Toronto's water?

The contaminants EPA monitoring detected in Toronto include Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Copper. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.