What was found in Decatur'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 | 1539.6 µg/L 38% of the EPA limit 4000 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2017 | 3/3 | SYR4 |
| Nitrate | 727.75 µg/L 7.3% of the EPA limit 10000 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2019 | 3/3 | SYR4 |
| Copper | 331.05 µg/L 25% of the EPA limit 1300 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2017 | 3/3 | SYR4 |
| Lead | 9.76 µg/L 65% of the EPA limit 15 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2017
Highest in the city: 97.6 µg/L — OAKWOOD COMMUNITY ASSOCIATION, INC. · 210 people · 2019 | 3/3 | SYR4 |
| TTHM | 57.2 µg/L 72% of the EPA limit 80 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2019 | 1/3 | SYR4 |
| Lithium | 41.3 µg/L No EPA limit set Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2023 | 1/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 30.5 µg/L 51% of the EPA limit 60 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2019 | 1/3 | SYR4 |
| Barium | 18.98 µg/L 0.9% of the EPA limit 2000 µg/L Highest in the city: RIVERBEND ESTATES · 50 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 4.6 µg/L No EPA limit set Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2014 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.345 pCi/L 22% of the EPA limit 15 pCi/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2014
Highest in the city: 4.3 pCi/L — OAKWOOD COMMUNITY ASSOCIATION, INC. · 210 people · 2017 | 3/3 | SYR4 |
| Chloroform | 3.1 µg/L No EPA limit set Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2014 | 2/3 | SYR4 |
| Dibromochloromethane | 3.1 µg/L No EPA limit set Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2014 | 1/3 | SYR4 |
| Arsenic | 1.455 µg/L 15% of the EPA limit 10 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2017 | 2/3 | SYR4 |
| Antimony, Total | 1.1 µg/L 18% of the EPA limit 6 µg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2017 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.8500 pCi/L 17% of the EPA limit 5 pCi/L Highest in the city: OAKWOOD COMMUNITY ASSOCIATION, INC. · 210 people · 2017 | 1/3 | SYR4 |
| Bromoform | 0.6000 µg/L No EPA limit set Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2014 | 1/3 | SYR4 |
| Lead | 0.0127 mg/L 85% of the EPA limit 0.0150 mg/L Main supplier: DECATUR WATER DEPARTMENT · 9,900 people · 2024 | 3/3 | LCR |
Water suppliers serving Decatur
| Supplier | Population served |
|---|---|
| DECATUR WATER DEPARTMENT | 9,900 |
| OAKWOOD COMMUNITY ASSOCIATION, INC. | 210 |
| RIVERBEND ESTATES | 50 |
Frequently asked questions about Decatur tap water
Is Decatur tap water safe to drink?
EPA testing detected 17 contaminants in the water serving Decatur. 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 Decatur?
3 public water suppliers report drinking-water monitoring for Decatur, Indiana to the EPA. Each is listed above with its population served.
What contaminants are in Decatur's water?
The contaminants EPA monitoring detected in Decatur include Fluoride, Nitrate, Copper, Lead, 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.