Is London, KY Tap Water Safe? Quality & Contaminants

What was found in London'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Fluoride	1047.5 µg/L 26% of the EPA limit 4000 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019 Highest in the city: 1375 µg/L — LONDON UTILITY COMMISSION · 8,855 people · 2019	3/5	SYR4
Copper	322.6 µg/L 25% of the EPA limit 1300 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019 Highest in the city: 524 µg/L — WOOD CREEK WATER DISTRICT · 14,892 people · 2019	5/5	SYR4
Nitrate	450 µg/L 4.5% of the EPA limit 10000 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019	3/5	SYR4
Nitrate-Nitrite	450 µg/L 4.5% of the EPA limit 10000 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2014	1/5	SYR4
TTHM	51.34 µg/L 64% of the EPA limit 80 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019 Highest in the city: 79.25 µg/L — LONDON UTILITY COMMISSION · 8,855 people · 2019	5/5	SYR4
Total Haloacetic Acids (HAA5)	39.11 µg/L 65% of the EPA limit 60 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019 Highest in the city: 58 µg/L — WEST LAUREL WATER ASSOC INC · 14,878 people · 2019	5/5	SYR4
Cyanide	30 µg/L 15% of the EPA limit 200 µg/L Highest in the city: LONDON UTILITY COMMISSION · 8,855 people · 2019	2/5	SYR4
Lead	12.47 µg/L 83% of the EPA limit 15 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2018 Highest in the city: 28.15 µg/L — LONDON UTILITY COMMISSION · 8,855 people · 2019	5/5	SYR4
Barium	20.8 µg/L 1% of the EPA limit 2000 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019	3/5	SYR4
Combined Radium (-226 And -228)	1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2014 Highest in the city: 4.234 pCi/L — LONDON UTILITY COMMISSION · 8,855 people · 2017	3/5	SYR4
Arsenic	2.9 µg/L 29% of the EPA limit 10 µg/L Highest in the city: WOOD CREEK WATER DISTRICT · 14,892 people · 2019	1/5	SYR4
Thallium, Total	0.1000 µg/L 5% of the EPA limit 2 µg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2019	1/5	SYR4
Pfba	0.0068 µg/L No EPA limit set Highest in the city: EAST LAUREL WATER DISTRICT · 16,062 people · 2024	2/5	UCMR-5
Pfhxa	0.0039 µg/L No EPA limit set Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2024	2/5	UCMR-5
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LAUREL CO WATER DISTRICT #2 · 16,899 people · 2024 Highest in the city: 0.0020 mg/L — LONDON UTILITY COMMISSION · 8,855 people · 2025	5/5	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 London

Supplier	Population served
LAUREL CO WATER DISTRICT #2	16,899
EAST LAUREL WATER DISTRICT	16,062
WOOD CREEK WATER DISTRICT	14,892
WEST LAUREL WATER ASSOC INC	14,878
LONDON UTILITY COMMISSION	8,855

Frequently asked questions about London tap water

Is London tap water safe to drink?

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

5 public water suppliers report drinking-water monitoring for London, Kentucky to the EPA. Each is listed above with its population served.

What contaminants are in London's water?

The contaminants EPA monitoring detected in London include Fluoride, Copper, Nitrate, Nitrate-Nitrite, TTHM. 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.