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Tap water quality report

Lancaster, KS

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Lancaster. 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.

2
water suppliers
3,938
people served
20
contaminants found
Kansas rankings Lead in Kansas PFAS in Kansas

What was found in Lancaster'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
520 µg/L 5.2%
of the EPA limit 10000 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
1/2 SYR4
Fluoride
285 µg/L 7.1%
of the EPA limit 4000 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2017
1/2 SYR4
Barium
219 µg/L 11%
of the EPA limit 2000 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2017
1/2 SYR4
TTHM
107 µg/L 134%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 117 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Chloroform
75.8 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 81.5 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
68.8 µg/L 115%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
2/2 SYR4
Lithium
55 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2024
1/2 UCMR-5
Trichloroacetic Acid
29.6 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 34 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Dichloroacetic Acid
32.2 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
2/2 SYR4
Copper
30.15 µg/L 2.3%
of the EPA limit 1300 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2017
2/2 SYR4
Bromodichloromethane
24.6 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 26.75 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Monochloroacetic Acid
5.8 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 9.725 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Dibromochloromethane
8.7 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
2/2 SYR4
Selenium
3.9 µg/L 7.8%
of the EPA limit 50 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2017
1/2 SYR4
Monobromoacetic Acid
2.475 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 3.38 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Dibromoacetic Acid
2.08 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
Highest in the city: 2.94 µg/L — LANCASTER, CITY OF · 248 people · 2019
2/2 SYR4
Arsenic
2.075 µg/L 21%
of the EPA limit 10 µg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2017
1/2 SYR4
Lead
1.3 µg/L 8.7%
of the EPA limit 15 µg/L
Highest in the city: LANCASTER, CITY OF · 248 people · 2017
1/2 SYR4
Bromoform
1.055 µg/L
No EPA limit set
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2019
2/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: ATCHISON CO RWD 5C · 3,690 people · 2023
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 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 Lancaster

SupplierPopulation served
ATCHISON CO RWD 5C 3,690
LANCASTER, CITY OF 248

Frequently asked questions about Lancaster tap water

Is Lancaster tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Lancaster. 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 Lancaster?

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

What contaminants are in Lancaster's water?

The contaminants EPA monitoring detected in Lancaster include Nitrate, Fluoride, Barium, TTHM, Chloroform. 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.