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Tap water quality report

Olathe, KS

EPA monitoring detected 13 contaminants across the 1 water supplier serving Olathe. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
143,014
people served
13
contaminants found
Kansas rankings Lead in Kansas PFAS in Kansas

What was found in Olathe's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
940 µg/L 24%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate
810 µg/L 8.1%
of the EPA limit 10000 µg/L
 1/1 SYR4
Copper
150 µg/L 12%
of the EPA limit 1300 µg/L
 1/1 SYR4
Barium
98 µg/L 4.9%
of the EPA limit 2000 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
96.2 µg/L 160%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
TTHM
89.5 µg/L 112%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Lead
24 µg/L 160%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Lithium
20.7 µg/L
No EPA limit set
 1/1 UCMR-5
Chromium
2.7 µg/L 2.7%
of the EPA limit 100 µg/L
 1/1 SYR4
Arsenic
2.2 µg/L 22%
of the EPA limit 10 µg/L
 1/1 SYR4
Selenium
2.2 µg/L 4.4%
of the EPA limit 50 µg/L
 1/1 SYR4
Atrazine
1.6 µg/L 53%
of the EPA limit 3 µg/L
 1/1 SYR4
Lead
0.0110 mg/L 73%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Olathe

SupplierPopulation served
OLATHE, CITY OF 143,014

Frequently asked questions about Olathe tap water

Is Olathe tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Olathe. 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 Olathe?

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

What contaminants are in Olathe's water?

The contaminants EPA monitoring detected in Olathe include Fluoride, Nitrate, Copper, Barium, Total Haloacetic Acids (HAA5). The full list, with the highest level found 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.