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Tap water quality report

Centralia, MO

EPA monitoring detected 13 contaminants across the 2 water suppliers serving Centralia. 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
8,990
people served
13
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in Centralia'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
Fluoride
1619 µg/L 40%
of the EPA limit 4000 µg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2018
2/2 SYR4
Nitrate-Nitrite
17 µg/L 0.2%
of the EPA limit 10000 µg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2019
Highest in the city: 270 µg/L — CENTRALIA PWS · 4,027 people · 2019
2/2 SYR4
Copper
162.45 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2019
2/2 SYR4
Lithium
79.9 µg/L
No EPA limit set
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2025
Highest in the city: 91 µg/L — CENTRALIA PWS · 4,027 people · 2024
2/2 UCMR-5
Barium
35.885 µg/L 1.8%
of the EPA limit 2000 µg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2018
2/2 SYR4
Lead
7.661 µg/L 51%
of the EPA limit 15 µg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2019
2/2 SYR4
TTHM
3.9225 µg/L 4.9%
of the EPA limit 80 µg/L
Highest in the city: CENTRALIA PWS · 4,027 people · 2019
1/2 SYR4
Bromoform
2.4 µg/L
No EPA limit set
Highest in the city: CENTRALIA PWS · 4,027 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.965 pCi/L 39%
of the EPA limit 5 pCi/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2019
1/2 SYR4
Chromium
1.887 µg/L 1.9%
of the EPA limit 100 µg/L
Highest in the city: CENTRALIA PWS · 4,027 people · 2018
1/2 SYR4
Dibromochloromethane
1.163 µg/L
No EPA limit set
Highest in the city: CENTRALIA PWS · 4,027 people · 2019
1/2 SYR4
Dichloroacetic Acid
1.16 µg/L
No EPA limit set
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2019
1/2 SYR4
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
Main supplier: BOONE COUNTY PWSD 10 · 4,963 people · 2025
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 Centralia

SupplierPopulation served
BOONE COUNTY PWSD 10 4,963
CENTRALIA PWS 4,027

Frequently asked questions about Centralia tap water

Is Centralia tap water safe to drink?

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

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

What contaminants are in Centralia's water?

The contaminants EPA monitoring detected in Centralia include Fluoride, Nitrate-Nitrite, Copper, Lithium, Barium. 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.