What was found in Lynden'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 290 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2012
Highest in the city: 17565 µg/L — DELTA WATER ASSOCIATION · 450 people · 2018 | 15/30 | SYR4 |
| Nitrate | 14200 µg/L 142% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 17100 µg/L — DELTA WATER ASSOCIATION · 450 people · 2019 | 20/30 | SYR4 |
| Fluoride | 780 µg/L 20% of the EPA limit 4000 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2012 | 11/30 | SYR4 |
| Barium | 12 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2012
Highest in the city: 250 µg/L — KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 5/30 | SYR4 |
| TTHM | 34.305 µg/L 43% of the EPA limit 80 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 106.09 µg/L — KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 22/30 | SYR4 |
| Chloroform | 31.6 µg/L No EPA limit set Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 90.6 µg/L — KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 20/30 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23.389999999999997 µg/L 39% of the EPA limit 60 µg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 89.28500000000003 µg/L — KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 18/30 | SYR4 |
| Trichloroacetic Acid | 15.489999999999995 µg/L No EPA limit set Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 56.04 µg/L — KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 16/30 | SYR4 |
| Monobromoacetic Acid | 36.1 µg/L No EPA limit set Highest in the city: KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 4/30 | SYR4 |
| Dichloroacetic Acid | 9.935 µg/L No EPA limit set Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 34.765 µg/L — CALMOR COVE CLUB · 44 people · 2019 | 14/30 | SYR4 |
| Dibromochloromethane | 28.16 µg/L No EPA limit set Highest in the city: MOUNTAIN VIEW WATER ASSOCIATION · 186 people · 2019 | 17/30 | SYR4 |
| Bromodichloromethane | 2.535000000000001 µg/L No EPA limit set Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2019
Highest in the city: 23.675 µg/L — MOUNTAIN VIEW WATER ASSOCIATION · 186 people · 2019 | 20/30 | SYR4 |
| Copper | 13 µg/L 1% of the EPA limit 1300 µg/L Highest in the city: FLEMINGS PLATT WATER ASSOCIATION · 84 people · 2018 | 1/30 | SYR4 |
| Bromoform | 10.34 µg/L No EPA limit set Highest in the city: Northwest Water Assoc. Inc. · 400 people · 2017 | 11/30 | SYR4 |
| Dibromoacetic Acid | 7.335 µg/L No EPA limit set Highest in the city: MOUNTAIN VIEW WATER ASSOCIATION · 186 people · 2019 | 14/30 | SYR4 |
| Arsenic | 7.3 µg/L 73% of the EPA limit 10 µg/L Highest in the city: BAKER VIEW WATER ASSOC · 40 people · 2018 | 9/30 | SYR4 |
| Lead | 4.9 µg/L 33% of the EPA limit 15 µg/L Highest in the city: SANDY POINT IMPROVEMENT CO · 2,098 people · 2016 | 1/30 | SYR4 |
| Gross Beta Particle Activity | 4.41 pCi/L No EPA limit set Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2015 | 10/30 | SYR4 |
| Monochloroacetic Acid | 2.86 µg/L No EPA limit set Highest in the city: KELLY ROAD WATER ASSOCIATION · 45 people · 2019 | 3/30 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the city: MOUNTAIN VIEW WATER ASSOCIATION · 186 people · 2013 | 1/30 | SYR4 |
| Dichloromethane | 1.5 µg/L 30% of the EPA limit 5 µg/L Highest in the city: CALMOR COVE CLUB · 44 people · 2018 | 1/30 | SYR4 |
| 1,2-Dichloropropane | 0.7800 µg/L 16% of the EPA limit 5 µg/L Highest in the city: POLE ROAD WATER ASSOCIATION · 1,960 people · 2019 | 1/30 | SYR4 |
| Lead | 0.0023 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: LYNDEN WATER DEPARTMENT · 20,062 people · 2023
Highest in the city: 0.0100 mg/L — DELTA WATER ASSOCIATION · 450 people · 2008 | 30/30 | LCR |
| PFBS | 0.0041 µg/L No EPA limit set Highest in the city: Northwest Water Assoc. Inc. · 400 people · 2025 | 1/30 | UCMR-5 |
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 Lynden
Frequently asked questions about Lynden tap water
Is Lynden tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Lynden. 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 Lynden?
30 public water suppliers report drinking-water monitoring for Lynden, Washington to the EPA. Each is listed above with its population served.
What contaminants are in Lynden's water?
The contaminants EPA monitoring detected in Lynden include Nitrate-Nitrite, Nitrate, Fluoride, Barium, 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.