What was found in May City'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 | 533.5 µg/L 13% of the EPA limit 4000 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Copper | 490.57 µg/L 38% of the EPA limit 1300 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2017 | 1/1 | SYR4 |
| Nitrate | 270 µg/L 2.7% of the EPA limit 10000 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Barium | 83.66 µg/L 4.2% of the EPA limit 2000 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| TTHM | 64.24999999999999 µg/L 80% of the EPA limit 80 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.41999999999999 µg/L 69% of the EPA limit 60 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Chloroform | 37.88 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 24.548499999999997 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Lithium | 23.3 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2023 | 1/1 | UCMR-5 |
| Xylenes, Total | 21.195 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2018 | 1/1 | SYR4 |
| Bromodichloromethane | 18.39999999999999 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 16.099999999999998 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 12.879999999999999 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 12.729999999999999 µg/L 42% of the EPA limit 30 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2018 | 1/1 | SYR4 |
| Lead | 9.474999999999998 µg/L 63% of the EPA limit 15 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2017 | 1/1 | SYR4 |
| Dibromochloromethane | 9.379999999999995 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.55 pCi/L 44% of the EPA limit 15 pCi/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Ethylbenzene | 4.8999999999999995 µg/L 0.7% of the EPA limit 700 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2018 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.099999999999998 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Chromium | 2.02 µg/L 2% of the EPA limit 100 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Arsenic | 1.875 µg/L 19% of the EPA limit 10 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 1.5750000000000002 pCi/L 32% of the EPA limit 5 pCi/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2018 | 1/1 | SYR4 |
| Bromoform | 1.27 µg/L No EPA limit set Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2019 | 1/1 | SYR4 |
| Selenium | 0.6000 µg/L 1.2% of the EPA limit 50 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Antimony, Total | 0.1000 µg/L 1.7% of the EPA limit 6 µg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2016 | 1/1 | SYR4 |
| Lead | 0.0049 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: OSCEOLA RURAL WATER SYSTEM-NORTH · 7,002 people · 2024 | 1/1 | 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 May City
| Supplier | Population served |
|---|---|
| OSCEOLA RURAL WATER SYSTEM-NORTH | 7,002 |
Frequently asked questions about May City tap water
Is May City tap water safe to drink?
EPA testing detected 26 contaminants in the water serving May City. 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 May City?
1 public water supplier report drinking-water monitoring for May City, Iowa to the EPA. Each is listed above with its population served.
What contaminants are in May City's water?
The contaminants EPA monitoring detected in May City include Fluoride, Copper, Nitrate, Barium, 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.