What was found in Maryville'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 |
|---|---|---|---|
| Chlorite | 892.9999999999995 µg/L 89% of the EPA limit 1000 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Fluoride | 497.99999999999983 µg/L 12% of the EPA limit 4000 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 360 µg/L 3.6% of the EPA limit 10000 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Copper | 224.84999999999985 µg/L 17% of the EPA limit 1300 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 240.49999999999997 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2018 | 2/3 | SYR4 |
| Barium | 102.6 µg/L 5.1% of the EPA limit 2000 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| TTHM | 56.779999999999994 µg/L 71% of the EPA limit 80 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 70.845 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Chloroform | 40.7 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 56.91999999999998 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 47.69999999999999 µg/L 79% of the EPA limit 60 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 49.8 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 33.525 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 36 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 16.025 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 3.832 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 13.579999999999997 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 11.669999999999998 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 12.985 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Lead | 9.619999999999994 µg/L 64% of the EPA limit 15 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 4.776499999999999 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019
Highest in the city: 4.8865 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2019 | 2/3 | SYR4 |
| Chromium | 2.9899999999999998 µg/L 3% of the EPA limit 100 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.7455 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 2/3 | SYR4 |
| Atrazine | 2.65 µg/L 88% of the EPA limit 3 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2.06 µg/L 21% of the EPA limit 10 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Simazine | 0.9900 µg/L 25% of the EPA limit 4 µg/L Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 1/3 | SYR4 |
| Bromoform | 0.6445 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2019 | 2/3 | SYR4 |
| Pfba | 0.0087 µg/L No EPA limit set Main supplier: MARYVILLE PWS · 10,775 people · 2024
Highest in the city: 0.0096 µg/L — NODAWAY COUNTY PWSD 1 · 6,428 people · 2024 | 2/3 | UCMR-5 |
| Lead | 0.0060 mg/L 40% of the EPA limit 0.0150 mg/L Main supplier: MARYVILLE PWS · 10,775 people · 2024 | 2/3 | 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 Maryville
| Supplier | Population served |
|---|---|
| MARYVILLE PWS | 10,775 |
| NODAWAY COUNTY PWSD 1 | 6,428 |
| GREAT NORTHWEST WHOLESALE WATER COMMISS | 25 |
Frequently asked questions about Maryville tap water
Is Maryville tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Maryville. 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 Maryville?
3 public water suppliers report drinking-water monitoring for Maryville, Missouri to the EPA. Each is listed above with its population served.
What contaminants are in Maryville's water?
The contaminants EPA monitoring detected in Maryville include Chlorite, Fluoride, Nitrate-Nitrite, Copper, 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.