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Contaminant guide

1,2,4-Trichlorobenzene in drinking water

The EPA limit for 1,2,4-Trichlorobenzene in drinking water is 70 µg/L. Of the 34,528 water suppliers tested, 79 had it detected.

70 µg/L
EPA limit (MCL)
0.2%
of suppliers detected it
(79/34,528)

What the EPA limit means

⚖️

70 µg/L

Maximum Contaminant Level — the enforceable ceiling a supplier must stay under.

🎯

70 µg/L

Health goal (MCLG) — the level with no known health effect. It is a goal, not a legal limit, and is often zero for carcinogens.

🧪

SYR4

Where these measurements come from. Hover the tag for the EPA programme and years.

Where 1,2,4-Trichlorobenzene was found

The water suppliers reporting the highest levels, worst first. For lead and copper that is the 90th-percentile result the action level is written against; for Six-Year Review data, the 95th percentile of each system's samples.

SupplierCityStateLevel vs EPA limit
Waterbury Water Department Wolcott CT
24.4 µg/L 35%
of the EPA limit 70 µg/L
Oakcrest Villas/Sun Resort Ocala MO
3.5 µg/L 5%
of the EPA limit 70 µg/L
Ripon, City of Ripon CA
3.1 µg/L 4.4%
of the EPA limit 70 µg/L
Morningview Subdivision Leesburg FL
3 µg/L 4.3%
of the EPA limit 70 µg/L
Corning Muni Water Department Corning IA
2.48 µg/L 3.5%
of the EPA limit 70 µg/L
Us Army Garrison-Redstone Arsenal Redstone Arsenal AL
2.1437 µg/L 3.1%
of the EPA limit 70 µg/L
Aquarion-Plainville Regional Southington CT
2 µg/L 2.9%
of the EPA limit 70 µg/L
Berwick Bayou Vista Ww Commission Berwick LA
1.6 µg/L 2.3%
of the EPA limit 70 µg/L
Crescent City Wtp Crescent City FL
1.6 µg/L 2.3%
of the EPA limit 70 µg/L
Maxwell Water Department Maxwell IA
1.37 µg/L 2%
of the EPA limit 70 µg/L
Waverly Water Department Waverly IA
1.34 µg/L 1.9%
of the EPA limit 70 µg/L
Pound Waterworks Pound WI
1.3 µg/L 1.9%
of the EPA limit 70 µg/L
Riverbend Motorcoach Resort Labelle FL
1.2 µg/L 1.7%
of the EPA limit 70 µg/L
Weatherstone S/D Oak Ridge NC
1.0815 µg/L 1.5%
of the EPA limit 70 µg/L
Oblates of St. Francis Elkton MD
0.9200 µg/L 1.3%
of the EPA limit 70 µg/L
Village of Forest Water System Forest LA
0.8800 µg/L 1.3%
of the EPA limit 70 µg/L
Echoing Hills Village Warsaw OH
0.8685 µg/L 1.2%
of the EPA limit 70 µg/L
Holiday Shores Estates Webb NY
0.8400 µg/L 1.2%
of the EPA limit 70 µg/L
Chesapeake Bay Estates — VA
0.7500 µg/L 1.1%
of the EPA limit 70 µg/L
Peace of Mind Estates Springfield MO
0.7300 µg/L 1%
of the EPA limit 70 µg/L
Friendship Hills Subd Stockton MO
0.7000 µg/L 1%
of the EPA limit 70 µg/L
Ruskin Mobile Home Park Ruskin FL
0.6900 µg/L 1%
of the EPA limit 70 µg/L
Ocwc Sweetwater Beach — MO
0.6600 µg/L 0.9%
of the EPA limit 70 µg/L
Monett Pws Monett MO
0.6400 µg/L 0.9%
of the EPA limit 70 µg/L
Southgate Mhp Water System Bossier City LA
0.6200 µg/L 0.9%
of the EPA limit 70 µg/L

Frequently asked questions about 1,2,4-Trichlorobenzene

What is 1,2,4-Trichlorobenzene in drinking water?

1,2,4-Trichlorobenzene is monitored in US public drinking water under EPA rules. Each supplier's result is reported to the EPA and published here with its source and period.

What is the EPA limit for 1,2,4-Trichlorobenzene?

The EPA's Maximum Contaminant Level for 1,2,4-Trichlorobenzene is 70 µg/L, and its health goal (MCLG) is 70 µg/L. A result above the limit means the supplier must act; the goal is the level at which no health effects are expected.

How common is 1,2,4-Trichlorobenzene in US tap water?

Of the 34,528 water suppliers with results on file, 79 detected 1,2,4-Trichlorobenzene — 0.2% of those tested.