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Tap water quality report

Monroe, CT

EPA monitoring detected 25 contaminants across the 2 water suppliers serving Monroe. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
351,794
people served
25
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Monroe's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
1560 µg/L 16%
of the EPA limit 10000 µg/L
 1/2 SYR4
Nitrate-Nitrite
1560 µg/L 16%
of the EPA limit 10000 µg/L
 1/2 SYR4
Fluoride
1080 µg/L 27%
of the EPA limit 4000 µg/L
 1/2 SYR4
Lead
668 µg/L 4453%
of the EPA limit, in the worst sample — 15 µg/L
 1/2 SYR4
Copper
360 µg/L 28%
of the EPA limit 1300 µg/L
 1/2 SYR4
TTHM
101 µg/L 126%
of the EPA limit, in the worst sample — 80 µg/L
 1/2 SYR4
Chloroform
79 µg/L
No EPA limit set
 1/2 SYR4
Total Haloacetic Acids (HAA5)
75 µg/L 125%
of the EPA limit, in the worst sample — 60 µg/L
 1/2 SYR4
Barium
55 µg/L 2.8%
of the EPA limit 2000 µg/L
 1/2 SYR4
Trichloroacetic Acid
38 µg/L
No EPA limit set
 1/2 SYR4
Dichloroacetic Acid
36 µg/L
No EPA limit set
 1/2 SYR4
Bromodichloromethane
19 µg/L
No EPA limit set
 1/2 SYR4
Dibromochloromethane
3 µg/L
No EPA limit set
 1/2 SYR4
Monochloroacetic Acid
3 µg/L
No EPA limit set
 1/2 SYR4
Dibromoacetic Acid
1 µg/L
No EPA limit set
 1/2 SYR4
Monobromoacetic Acid
1 µg/L
No EPA limit set
 1/2 SYR4
Bromoform
0.6000 µg/L
No EPA limit set
 1/2 SYR4
PFOA
0.0109 µg/L
No EPA limit set
 1/2 UCMR-5
Pfba
0.0076 µg/L
No EPA limit set
 1/2 UCMR-5
Pfhxa
0.0074 µg/L
No EPA limit set
 1/2 UCMR-5
Pfpea
0.0067 µg/L
No EPA limit set
 1/2 UCMR-5
PFOS
0.0066 µg/L
No EPA limit set
 1/2 UCMR-5
PFBS
0.0041 µg/L
No EPA limit set
 1/2 UCMR-5
Pfhpa
0.0039 µg/L
No EPA limit set
 1/2 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 2/2 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. 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 Monroe

SupplierPopulation served
AQUARION-EASTERN FAIRFIELD COUNTY 351,756
27 MAPLE DRIVE 38

Frequently asked questions about Monroe tap water

Is Monroe tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Monroe. 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 Monroe?

2 public water suppliers report drinking-water monitoring for Monroe, Connecticut to the EPA. Each is listed above with its population served.

What contaminants are in Monroe's water?

The contaminants EPA monitoring detected in Monroe include Nitrate, Nitrate-Nitrite, Fluoride, Lead, Copper. The full list, with the highest level found 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.