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Tap water quality report

Moses Lake, WA

EPA monitoring detected 40 contaminants across the 35 water suppliers serving Moses Lake. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

35
water suppliers
36,930
people served
40
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Moses Lake's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
14400 µg/L 144%
of the EPA limit, in the worst sample — 10000 µg/L
 31/35 SYR4
Nitrate-Nitrite
14400 µg/L 144%
of the EPA limit, in the worst sample — 10000 µg/L
 25/35 SYR4
Fluoride
2970 µg/L 74%
of the EPA limit 4000 µg/L
 26/35 SYR4
Nitrite
440 µg/L 44%
of the EPA limit 1000 µg/L
 2/35 SYR4
Copper
241 µg/L 19%
of the EPA limit 1300 µg/L
 17/35 SYR4
Barium
70.3 µg/L 3.5%
of the EPA limit 2000 µg/L
 19/35 SYR4
TTHM
45.7 µg/L 57%
of the EPA limit 80 µg/L
 19/35 SYR4
Chloroform
36.1 µg/L
No EPA limit set
 14/35 SYR4
Lithium
35.6 µg/L
No EPA limit set
 1/35 UCMR-5
Bromoform
18.5 µg/L
No EPA limit set
 16/35 SYR4
Bromodichloromethane
15.9 µg/L
No EPA limit set
 14/35 SYR4
Dibromochloromethane
15.2 µg/L
No EPA limit set
 18/35 SYR4
Total Haloacetic Acids (HAA5)
13.94 µg/L 23%
of the EPA limit 60 µg/L
 15/35 SYR4
Chromium
13.7 µg/L 14%
of the EPA limit 100 µg/L
 11/35 SYR4
Dibromoacetic Acid
10.2 µg/L
No EPA limit set
 12/35 SYR4
Lead
9.19 µg/L 61%
of the EPA limit 15 µg/L
 6/35 SYR4
Dichloroacetic Acid
7.5 µg/L
No EPA limit set
 8/35 SYR4
Arsenic
6.54 µg/L 65%
of the EPA limit 10 µg/L
 23/35 SYR4
Trichloroacetic Acid
5.9 µg/L
No EPA limit set
 5/35 SYR4
Trichloroethylene
5.34 µg/L 107%
of the EPA limit, in the worst sample — 5 µg/L
 2/35 SYR4
Combined Radium (-226 And -228)
4.77 pCi/L 95%
of the EPA limit 5 pCi/L
 2/35 SYR4
1,1,2-Trichloroethane
3.9 µg/L 78%
of the EPA limit 5 µg/L
 1/35 SYR4
Selenium
3.31 µg/L 6.6%
of the EPA limit 50 µg/L
 7/35 SYR4
Combined Uranium
2.38 µg/L 7.9%
of the EPA limit 30 µg/L
 1/35 SYR4
Monobromoacetic Acid
1.3 µg/L
No EPA limit set
 2/35 SYR4
Thallium, Total
1.29 µg/L 65%
of the EPA limit 2 µg/L
 6/35 SYR4
Mercury
0.9300 µg/L 47%
of the EPA limit 2 µg/L
 1/35 SYR4
cis-1,2-Dichloroethylene
0.7100 µg/L 1%
of the EPA limit 70 µg/L
 1/35 SYR4
1,2-Dichloropropane
0.6000 µg/L 12%
of the EPA limit 5 µg/L
 1/35 SYR4
Antimony, Total
0.3100 µg/L 5.2%
of the EPA limit 6 µg/L
 4/35 SYR4
Picloram
0.2050 µg/L 0%
of the EPA limit 500 µg/L
 1/35 SYR4
Cadmium
0.1400 µg/L 2.8%
of the EPA limit 5 µg/L
 1/35 SYR4
Atrazine
0.0600 µg/L 2%
of the EPA limit 3 µg/L
 2/35 SYR4
PFHXS
0.0541 µg/L
No EPA limit set
 1/35 UCMR-5
PFOS
0.0522 µg/L
No EPA limit set
 1/35 UCMR-5
Lead
0.0126 mg/L 84%
of the EPA limit 0.0150 mg/L
 32/35 LCR
Simazine
0.0100 µg/L 0.3%
of the EPA limit 4 µg/L
 1/35 SYR4
Pfhxa
0.0073 µg/L
No EPA limit set
 1/35 UCMR-5
Pfpes
0.0053 µg/L
No EPA limit set
 1/35 UCMR-5
PFBS
0.0044 µg/L
No EPA limit set
 1/35 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 single worst sample on record — 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 Moses Lake

SupplierPopulation served
MOSES LAKE CITY OF 32,428
CASCADE VALLEY WATER DISTRICT 379
GOLDEN PLAINS MHP #1 360
STRATFORD ROAD ESTATES 312
HILLCREST WATER USERS ASSN 300
SKYLINE WATER SYSTEM INC 293
PARKER SPRING ACRES WATER ASSOC 255
SUNRISE WATER ASSOCIATION 250
RIDGEVIEW ESTATES WATER ASSOCIATION 240
GROVE TERRACE MHP TWO LLC 220
Saddle Mountain Water Assoc. 219
COUNTRY CLUB ESTATES WATER SYSTEM 186
Westshore Water Company 153
SKYLINE ACRES INC 151
HATTON TOWN OF 105
SUNBURST ESTATES WATER ASSN 100
FIRST POTHOLES WATER USERS ASSN 90
Viking Road Water System 88
HI LO HOMEOWNERS ASSN 87
MARINE VIEW HOME OWNERS ASSN 87
SECT 11 DIV 1 Ridgeview Water Assn 79
ADMIRAL WATER USERS ASSN 74
SUNSET ACRES WATER ASSN 61
RAINIER TRACTS WATER ASSN 61
MT VIEW WATER SYSTEM 44
SUNSET ACRES WATER ASSOCIATION 40
SILVER SANDS CONDO WATER 37
SUNRISE ESTATES WATER SYSTEM 33
ORCHARD HOMES WATER SYSTEM 31
MAPLES PLAT WATER SYSTEM 30
Desert Hills 30
Lyons Water System 28
COUNTRY LANE EAST 27
SUN DESERT INC 27
PARK ORCHARD TRACT 40 25

Frequently asked questions about Moses Lake tap water

Is Moses Lake tap water safe to drink?

EPA testing detected 40 contaminants in the water serving Moses 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 Moses Lake?

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

What contaminants are in Moses Lake's water?

The contaminants EPA monitoring detected in Moses Lake include Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Copper. The full list, with the highest level found 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.