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Tap water quality report

Derby, KS

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Derby. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
31,458
people served
15
contaminants found
Kansas rankings Lead in Kansas PFAS in Kansas

What was found in Derby'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
Copper
1600 µg/L 123%
of the EPA limit, in the worst sample — 1300 µg/L
 2/2 SYR4
TTHM
69 µg/L 86%
of the EPA limit 80 µg/L
 2/2 SYR4
Lead
60 µg/L 400%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
Total Haloacetic Acids (HAA5)
53 µg/L 88%
of the EPA limit 60 µg/L
 2/2 SYR4
Lithium
31.8 µg/L
No EPA limit set
 2/2 UCMR-5
Chloroform
30 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
23 µg/L
No EPA limit set
 2/2 SYR4
Monobromoacetic Acid
21 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
18 µg/L
No EPA limit set
 2/2 SYR4
Dichloroacetic Acid
18 µg/L
No EPA limit set
 2/2 SYR4
Monochloroacetic Acid
18 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
9.6 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
5.7 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
5 µg/L
No EPA limit set
 2/2 SYR4
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
 2/2 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 Derby

SupplierPopulation served
DERBY, CITY OF 25,413
SEDGWICK CO RWD 3 6,045

Frequently asked questions about Derby tap water

Is Derby tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Derby. 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 Derby?

2 public water suppliers report drinking-water monitoring for Derby, Kansas to the EPA. Each is listed above with its population served.

What contaminants are in Derby's water?

The contaminants EPA monitoring detected in Derby include Copper, TTHM, Lead, Total Haloacetic Acids (HAA5), Lithium. 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.