Tap WaterIndex

← North Dakota

Tap water quality report

Mayville, ND

EPA monitoring detected 10 contaminants across the 1 water supplier serving Mayville. 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.

1
water supplier
1,858
people served
10
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Mayville'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
Copper
1251 µg/L 96%
of the EPA limit 1300 µg/L
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Lead
14.77 µg/L 98%
of the EPA limit 15 µg/L
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
TTHM
4.36 µg/L 5.5%
of the EPA limit 80 µg/L
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Bromodichloromethane
1.64 µg/L
No EPA limit set
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Chloroform
1.44 µg/L
No EPA limit set
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Dibromochloromethane
1.32 µg/L
No EPA limit set
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.218 µg/L 2%
of the EPA limit 60 µg/L
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.216 µg/L
No EPA limit set
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.2 µg/L
No EPA limit set
Main supplier: MAYVILLE CITY OF · 1,858 people · 2019
1/1 SYR4
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
Main supplier: MAYVILLE CITY OF · 1,858 people · 2025
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 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 Mayville

SupplierPopulation served
MAYVILLE CITY OF 1,858

Frequently asked questions about Mayville tap water

Is Mayville tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Mayville. 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 Mayville?

1 public water supplier report drinking-water monitoring for Mayville, North Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Mayville's water?

The contaminants EPA monitoring detected in Mayville include Copper, Lead, TTHM, Bromodichloromethane, Chloroform. 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.