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Tap water quality report

La Conner, WA

EPA monitoring detected 17 contaminants across the 2 water suppliers serving La Conner. 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
2,254
people served
17
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in La Conner'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
290.64999999999986 µg/L 22%
of the EPA limit 1300 µg/L
Highest in the city: KWONESUM · 42 people · 2018
1/2 SYR4
TTHM
19.889999999999997 µg/L 25%
of the EPA limit 80 µg/L
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 34.33 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Chloroform
18.569999999999997 µg/L
No EPA limit set
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 26.499999999999996 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
15.79 µg/L 26%
of the EPA limit 60 µg/L
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 22.909999999999997 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Bromodichloromethane
1.5399999999999998 µg/L
No EPA limit set
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 13.86 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Dichloroacetic Acid
8.715 µg/L
No EPA limit set
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 10.564999999999998 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Trichloroacetic Acid
7.839999999999997 µg/L
No EPA limit set
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
Highest in the city: 10.249999999999998 µg/L — KWONESUM · 42 people · 2019
2/2 SYR4
Lead
7 µg/L 47%
of the EPA limit 15 µg/L
Highest in the city: KWONESUM · 42 people · 2018
1/2 SYR4
Dibromochloromethane
5.54 µg/L
No EPA limit set
Highest in the city: KWONESUM · 42 people · 2019
1/2 SYR4
Gross Beta Particle Activity
4.1 pCi/L
No EPA limit set
Highest in the city: KWONESUM · 42 people · 2014
1/2 SYR4
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
Highest in the city: KWONESUM · 42 people · 2014
1/2 SYR4
Barium
2 µg/L 0.1%
of the EPA limit 2000 µg/L
Highest in the city: KWONESUM · 42 people · 2014
1/2 SYR4
Monochloroacetic Acid
1.57 µg/L
No EPA limit set
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
Highest in the city: KWONESUM · 42 people · 2014
1/2 SYR4
Dibromoacetic Acid
1.47 µg/L
No EPA limit set
Highest in the city: KWONESUM · 42 people · 2019
1/2 SYR4
Bromoform
0.5000 µg/L
No EPA limit set
Highest in the city: KWONESUM · 42 people · 2019
1/2 SYR4
Lead
0.0016 mg/L 11%
of the EPA limit 0.0150 mg/L
Main supplier: SHELTER BAY COMMUNITY INC · 2,212 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 La Conner

SupplierPopulation served
SHELTER BAY COMMUNITY INC 2,212
KWONESUM 42

Frequently asked questions about La Conner tap water

Is La Conner tap water safe to drink?

EPA testing detected 17 contaminants in the water serving La Conner. 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 La Conner?

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

What contaminants are in La Conner's water?

The contaminants EPA monitoring detected in La Conner include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Bromodichloromethane. 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.