What was found in ZIP 21237
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3800 µg/L 38% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 2840 µg/L 28% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 1620 µg/L 41% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| TTHM | 115 µg/L 144% of the EPA limit, in the worst sample — 80 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 103 µg/L 172% of the EPA limit, in the worst sample — 60 µg/L | 1/1 | SYR4 |
| Chloroform | 101 µg/L No EPA limit set | 1/1 | SYR4 |
| Trichloroacetic Acid | 63 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 43 µg/L No EPA limit set | 1/1 | SYR4 |
| Barium | 36.1 µg/L 1.8% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Monochloroacetic Acid | 21 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromodichloromethane | 13 µg/L No EPA limit set | 1/1 | SYR4 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L | 1/1 | SYR4 |
| Gross Beta Particle Activity | 5 pCi/L No EPA limit set | 1/1 | SYR4 |
| Atrazine | 3.9 µg/L 130% of the EPA limit, in the worst sample — 3 µg/L | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.7 pCi/L 25% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 3 µg/L No EPA limit set | 1/1 | SYR4 |
| Dibromochloromethane | 3 µg/L No EPA limit set | 1/1 | SYR4 |
| Monobromoacetic Acid | 3 µg/L No EPA limit set | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 1.6 pCi/L 32% of the EPA limit 5 pCi/L | 1/1 | SYR4 |
| Simazine | 1.4 µg/L 35% of the EPA limit 4 µg/L | 1/1 | SYR4 |
| Bromoform | 1 µg/L No EPA limit set | 1/1 | SYR4 |
| Toxaphene | 0.1290 µg/L 4.3% of the EPA limit 3 µg/L | 1/1 | SYR4 |
| Chlordane | 0.0220 µg/L 1.1% of the EPA limit 2 µg/L | 1/1 | SYR4 |
| Pfpea | 0.0030 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Lead | 0.0027 mg/L 18% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 21237
| Supplier | State | Population served |
|---|---|---|
| CITY OF BALTIMORE | MD | 1,600,000 |
Frequently asked questions about ZIP 21237 tap water
Is the tap water in ZIP 21237 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 21237. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 21237?
1 public water supplier report EPA drinking-water monitoring for ZIP 21237. Each is listed above with its population served.
What contaminants are in ZIP 21237's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.