← Mount Vernon, WA

Tap water quality report

ZIP 98257 — Mount Vernon, WA

EPA monitoring across the 2 water suppliers serving ZIP 98257 in Mount Vernon, WA detected 13 contaminants. A detection doesn't automatically mean the water is unsafe — see the highest level found below, with the EPA limit for each.

2
water suppliers
27,321
people served
13
contaminants found

What was found in ZIP 98257

The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
830 µg/L 21%
of the EPA limit 4000 µg/L
1/2 SYR4
TTHM
43.7 µg/L 55%
of the EPA limit 80 µg/L
2/2 SYR4
Chloroform
42.4 µg/L
No EPA limit set
2/2 SYR4
Total Haloacetic Acids (HAA5)
35 µg/L 58%
of the EPA limit 60 µg/L
2/2 SYR4
Trichloroacetic Acid
22.6 µg/L
No EPA limit set
2/2 SYR4
Dichloroacetic Acid
16 µg/L
No EPA limit set
2/2 SYR4
Barium
15 µg/L 0.8%
of the EPA limit 2000 µg/L
1/2 SYR4
Copper
13 µg/L 1%
of the EPA limit 1300 µg/L
1/2 SYR4
Bromodichloromethane
1.7 µg/L
No EPA limit set
2/2 SYR4
Monochloroacetic Acid
1.6 µg/L
No EPA limit set
1/2 SYR4
Di(2-ethylhexyl) Phthalate
0.7200 µg/L 12%
of the EPA limit 6 µg/L
1/2 SYR4
Thallium, Total
0.1700 µg/L 8.5%
of the EPA limit 2 µg/L
1/2 SYR4
Lead
0.0016 mg/L 11%
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.

Water suppliers serving ZIP 98257

SupplierStatePopulation served
ANACORTES CITY OF WA 25,109
SHELTER BAY COMMUNITY INC WA 2,212

Frequently asked questions about ZIP 98257 tap water

Is the tap water in ZIP 98257 safe to drink?

EPA testing detected 13 contaminants across the water suppliers serving ZIP 98257. 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 98257?

2 public water suppliers report EPA drinking-water monitoring for ZIP 98257. Each is listed above with its population served.

What contaminants are in ZIP 98257's water?

EPA monitoring detected Fluoride, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others across this ZIP's suppliers. The full list with levels and sources is above.