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Tap water quality report

Melissa, TX

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Melissa. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
36,950
people served
21
contaminants found
Texas rankings Lead in Texas PFAS in Texas

What was found in Melissa'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
1330 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
1/2 SYR4
Nitrate-Nitrite
1264.4 µg/L 13%
of the EPA limit 10000 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2015
1/2 SYR4
Copper
740.6 µg/L 57%
of the EPA limit 1300 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2018
Highest in the city: 1050 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Fluoride
810 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
1/2 SYR4
TTHM
53.14 µg/L 66%
of the EPA limit 80 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the city: 53.755 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
30.835 µg/L 51%
of the EPA limit 60 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Lithium
26.3 µg/L
No EPA limit set
Highest in the city: NORTH COLLIN SUD · 10,716 people · 2024
1/2 UCMR-5
Bromodichloromethane
21 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the city: 22.955 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Dichloroacetic Acid
18.92 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Chloroform
16.95 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the city: 18.09 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Dibromochloromethane
14.3 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Lead
10.9 µg/L 73%
of the EPA limit 15 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2018
2/2 SYR4
Dibromoacetic Acid
9.06 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Monochloroacetic Acid
7.3 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Trichloroacetic Acid
6.61 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the city: 6.635 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Bromoform
5.353 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
2/2 SYR4
Monobromoacetic Acid
2.68 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2019
Highest in the city: 4.06 µg/L — NORTH COLLIN SUD · 10,716 people · 2019
2/2 SYR4
Barium
1.8 µg/L 0.1%
of the EPA limit 2000 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
1/2 SYR4
Atrazine
0.1000 µg/L 3.3%
of the EPA limit 3 µg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2019
1/2 SYR4
Pfba
0.0080 µg/L
No EPA limit set
Main supplier: CITY OF MELISSA · 26,234 people · 2024
Highest in the city: 0.0119 µg/L — NORTH COLLIN SUD · 10,716 people · 2025
2/2 UCMR-5
Lead
0.0014 mg/L 9.5%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF MELISSA · 26,234 people · 2024
Highest in the city: 0.0019 mg/L — NORTH COLLIN SUD · 10,716 people · 2025
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 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 Melissa

SupplierPopulation served
CITY OF MELISSA 26,234
NORTH COLLIN SUD 10,716

Frequently asked questions about Melissa tap water

Is Melissa tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Melissa. 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 Melissa?

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

What contaminants are in Melissa's water?

The contaminants EPA monitoring detected in Melissa include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.