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Tap water quality report

St. Robert, MO

EPA monitoring detected 9 contaminants across the 3 water suppliers serving St. Robert. 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.

3
water suppliers
5,295
people served
9
contaminants found
Missouri rankings Lead in Missouri PFAS in Missouri

What was found in St. Robert'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
1445 µg/L 36%
of the EPA limit 4000 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2018
1/3 SYR4
Nitrate-Nitrite
731.5 µg/L 7.3%
of the EPA limit 10000 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2019
1/3 SYR4
Barium
187.6 µg/L 9.4%
of the EPA limit 2000 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2018
1/3 SYR4
Copper
132.15 µg/L 10%
of the EPA limit 1300 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2018
1/3 SYR4
Lead
8.6905 µg/L 58%
of the EPA limit 15 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2018
1/3 SYR4
Chromium
1.44 µg/L 1.4%
of the EPA limit 100 µg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2018
1/3 SYR4
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
Main supplier: ST ROBERT PWS · 5,192 people · 2019
1/3 SYR4
PFOS
0.0120 µg/L
No EPA limit set
Main supplier: ST ROBERT PWS · 5,192 people · 2024
1/3 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: ST ROBERT PWS · 5,192 people · 2024
Highest in the city: 0.0011 mg/L — CHARITY PWS · 55 people · 2023
3/3 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 St. Robert

SupplierPopulation served
ST ROBERT PWS 5,192
CHARITY PWS 55
ROLLING HILLS PWS 48

Frequently asked questions about St. Robert tap water

Is St. Robert tap water safe to drink?

EPA testing detected 9 contaminants in the water serving St. Robert. 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 St. Robert?

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

What contaminants are in St. Robert's water?

The contaminants EPA monitoring detected in St. Robert include Fluoride, Nitrate-Nitrite, Barium, Copper, Lead. 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.