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Tap water quality report

ZIP 63432 — Williamstown, MO

EPA monitoring across the 2 water suppliers serving ZIP 63432 in Williamstown, MO detected 18 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

2
water suppliers
10,500
people served
18
contaminants found

What was found in ZIP 63432

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
6779 µg/L 68%
of the EPA limit 10000 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
1/2 SYR4
Copper
642.4 µg/L 49%
of the EPA limit 1300 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
2/2 SYR4
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
1/2 SYR4
TTHM
9.848 µg/L 12%
of the EPA limit 80 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 76.48 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Chloroform
2.5 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 67.07 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Barium
54.07 µg/L 2.7%
of the EPA limit 2000 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
1/2 SYR4
Total Haloacetic Acids (HAA5)
52.435 µg/L 87%
of the EPA limit 60 µg/L
Highest in the ZIP: SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
1/2 SYR4
Dichloroacetic Acid
2.9175 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 30.235 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Trichloroacetic Acid
2.774 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 21.88 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Bromodichloromethane
3.244 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 12.34 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Monobromoacetic Acid
4.7095 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 8.825 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Lead
4.015 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
Highest in the ZIP: 4.034 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2018
2/2 SYR4
Dibromochloromethane
3.266 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
2/2 SYR4
Chromium
3.0075 µg/L 3%
of the EPA limit 100 µg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
1/2 SYR4
Dibromoacetic Acid
1.364 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 1.365 µg/L — SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2019
2/2 SYR4
Bromoform
0.7725 µg/L
No EPA limit set
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
1/2 SYR4
Pfba
0.0120 µg/L
No EPA limit set
Highest in the ZIP: SCOTLAND COUNTY CONS PWSD 1 · 3,360 people · 2024
1/2 UCMR-5
Lead
0.0022 mg/L 15%
of the EPA limit 0.0150 mg/L
Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2023
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.

Water suppliers serving ZIP 63432

SupplierStatePopulation served
CLARK COUNTY CONS PWSD 1 MO 7,140
SCOTLAND COUNTY CONS PWSD 1 MO 3,360

Frequently asked questions about ZIP 63432 tap water

Is the tap water in ZIP 63432 safe to drink?

EPA testing detected 18 contaminants across the water suppliers serving ZIP 63432. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 63432?

2 public water suppliers report EPA drinking-water monitoring for ZIP 63432. Each is listed above with its population served.

What contaminants are in ZIP 63432's water?

EPA monitoring detected Nitrate-Nitrite, Copper, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.