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Tap water quality report

Medical Lake, WA

EPA monitoring detected 19 contaminants across the 4 water suppliers serving Medical Lake. 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.

4
water suppliers
6,072
people served
19
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Medical Lake'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
Nitrate
2870 µg/L 29%
of the EPA limit 10000 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
1/4 SYR4
Nitrate-Nitrite
1500 µg/L 15%
of the EPA limit 10000 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
1/4 SYR4
Fluoride
222 µg/L 5.6%
of the EPA limit 4000 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 510.85 µg/L — CONSOLIDATED SUPPORT SERVICES · 569 people · 2019
3/4 SYR4
Barium
13.7 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 76 µg/L — LAKEHURST H2O · 170 people · 2012
3/4 SYR4
TTHM
9.565 µg/L 12%
of the EPA limit 80 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 18.1 µg/L — LAKEHURST H2O · 170 people · 2018
4/4 SYR4
Lithium
13.3 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2024
2/4 UCMR-5
Copper
11.3 µg/L 0.9%
of the EPA limit 1300 µg/L
Highest in the city: LAKEHURST H2O · 170 people · 2012
2/4 SYR4
Dibromochloromethane
2.94 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 6.5945 µg/L — LAKEHURST H2O · 170 people · 2018
4/4 SYR4
Bromodichloromethane
2.77 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 6.0045 µg/L — LAKEHURST H2O · 170 people · 2018
4/4 SYR4
Chloroform
2.275 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 4.177 µg/L — LAKEHURST H2O · 170 people · 2018
4/4 SYR4
Bromoform
2.2 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 4.135 µg/L — CONSOLIDATED SUPPORT SERVICES · 569 people · 2019
4/4 SYR4
Total Haloacetic Acids (HAA5)
1.4525 µg/L 2.4%
of the EPA limit 60 µg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2018
Highest in the city: 3.7855 µg/L — LAKEHURST H2O · 170 people · 2017
4/4 SYR4
Combined Radium (-226 And -228)
2.62 pCi/L 52%
of the EPA limit 5 pCi/L
Highest in the city: CONSOLIDATED SUPPORT SERVICES · 569 people · 2015
1/4 SYR4
Dichloroacetic Acid
1.4525 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2019
Highest in the city: 2.193 µg/L — LAKEHURST H2O · 170 people · 2017
4/4 SYR4
Dibromoacetic Acid
1.5925 µg/L
No EPA limit set
Highest in the city: LAKEHURST H2O · 170 people · 2017
2/4 SYR4
Lead
0.3000 µg/L 2%
of the EPA limit 15 µg/L
Highest in the city: CONSOLIDATED SUPPORT SERVICES · 569 people · 2019
1/4 SYR4
PFHXS
0.0053 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2024
1/4 UCMR-5
PFOS
0.0044 µg/L
No EPA limit set
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2024
1/4 UCMR-5
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
Main supplier: MEDICAL LAKE CITY OF · 4,982 people · 2025
Highest in the city: 0.0043 mg/L — CONSOLIDATED SUPPORT SERVICES · 569 people · 2024
4/4 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 Medical Lake

SupplierPopulation served
MEDICAL LAKE CITY OF 4,982
CONSOLIDATED SUPPORT SERVICES 569
STRATHVIEW WATER DISTRICT 16 351
LAKEHURST H2O 170

Frequently asked questions about Medical Lake tap water

Is Medical Lake tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Medical Lake. 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 Medical Lake?

4 public water suppliers report drinking-water monitoring for Medical Lake, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Medical Lake's water?

The contaminants EPA monitoring detected in Medical Lake include Nitrate, Nitrate-Nitrite, 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.