What was found in Mahwah twp-0233'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 |
|---|---|---|---|
| Nitrate | 3100 µg/L 31% of the EPA limit 10000 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 3081 µg/L 31% of the EPA limit 10000 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| Fluoride | 600 µg/L 15% of the EPA limit 4000 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| Copper | 435.2 µg/L 33% of the EPA limit 1300 µg/L Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2018 | 2/2 | SYR4 |
| Barium | 118.2 µg/L 5.9% of the EPA limit 2000 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| TTHM | 55.859999999999985 µg/L 70% of the EPA limit 80 µg/L Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 39.26 µg/L 65% of the EPA limit 60 µg/L Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Lithium | 33.1 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Monochloroacetic Acid | 32.754999999999995 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Chloroform | 31.019999999999996 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 23.57999999999999 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Lead | 18.699999999999974 µg/L 125% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2018 | 2/2 | SYR4 |
| Bromodichloromethane | 17.099999999999994 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 14.985 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 9.2 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 8.828000000000003 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 8.104 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Chromium | 3.6372999999999998 µg/L 3.6% of the EPA limit 100 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| Combined Uranium | 2.1 µg/L 7% of the EPA limit 30 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| Bromoform | 1.8539999999999994 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| Arsenic | 0.7190 µg/L 7.2% of the EPA limit 10 µg/L Highest in the city: BOGERTS RANCH ESTATES IN · 225 people · 2018 | 1/2 | SYR4 |
| PFOA | 0.0125 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0061 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0061 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0060 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0044 mg/L 29% of the EPA limit 0.0150 mg/L Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2024
Highest in the city: 0.0053 mg/L — BOGERTS RANCH ESTATES IN · 225 people · 2025 | 2/2 | LCR |
| PFOS | 0.0045 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0041 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
| Pfhpa | 0.0039 µg/L No EPA limit set Main supplier: MAHWAH WATER DEPARTMENT · 26,777 people · 2025 | 1/2 | UCMR-5 |
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 Mahwah twp-0233
| Supplier | Population served |
|---|---|
| MAHWAH WATER DEPARTMENT | 26,777 |
| BOGERTS RANCH ESTATES IN | 225 |
Frequently asked questions about Mahwah twp-0233 tap water
Is Mahwah twp-0233 tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Mahwah twp-0233. 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 Mahwah twp-0233?
2 public water suppliers report drinking-water monitoring for Mahwah twp-0233, New Jersey to the EPA. Each is listed above with its population served.
What contaminants are in Mahwah twp-0233's water?
The contaminants EPA monitoring detected in Mahwah twp-0233 include Nitrate, Nitrate-Nitrite, Fluoride, 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.