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Tap water quality report

Lake Meridian Water District

EPA monitoring tested this supplier for 88 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

88
contaminants tested
14
detected
24,231
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Local government
Counties served
King

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
8
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2025-04-01 → 2025-06-30
MR Monitoring Resolved 2025-04-01 → 2025-06-30
MR Monitoring Resolved 2022-01-01 → 2022-12-31
Other Monitoring Resolved 2017-07-01
Other Monitoring Resolved 2013-07-01
MR Monitoring Resolved 2004-01-01 → 2004-12-31
MR Monitoring Resolved 2004-01-01 → 2004-12-31
MR Monitoring Resolved 1993-01-01 → 1994-01-01

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Chloroform
27.814 µg/L
No EPA limit set
worst single sample: 33.1 µg/L
74/74 SYR4 2012–2019
TTHM
34.245 µg/L 43%
of the EPA limit 80 µg/L
worst single sample: 43 µg/L
72/72 SYR4 2012–2019
Bromodichloromethane
6.99 µg/L
No EPA limit set
worst single sample: 7.7 µg/L
63/73 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28.435 µg/L 47%
of the EPA limit 60 µg/L
worst single sample: 32.1 µg/L
60/61 SYR4 2012–2019
Trichloroacetic Acid
15.31 µg/L
No EPA limit set
worst single sample: 18.6 µg/L
60/62 SYR4 2012–2019
Dichloroacetic Acid
12.645 µg/L
No EPA limit set
worst single sample: 13.8 µg/L
58/59 SYR4 2012–2019
Dibromochloromethane
2.94 µg/L
No EPA limit set
worst single sample: 3.3 µg/L
53/71 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
 4/4 SYR4 2014
Arsenic
5.8 µg/L 58%
of the EPA limit 10 µg/L
worst single sample: 6 µg/L
3/4 SYR4 2014
Bromoform
0.5950 µg/L
No EPA limit set
worst single sample: 0.6000 µg/L
2/74 SYR4 2012–2019
Nitrate
290 µg/L 2.9%
of the EPA limit 10000 µg/L
 2/64 SYR4 2012–2018
Monobromoacetic Acid
1.1 µg/L
No EPA limit set
 1/62 SYR4 2012–2019
Lithium
17.7 µg/L
No EPA limit set
 1/12 UCMR-5 2025
74 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEthylbenzeneHfpo-DaLeadMercuryMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitrate-NitriteNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Brent Lewis

Frequently asked questions about Lake Meridian Water District

Is Lake Meridian Water District tap water safe to drink?

EPA monitoring detected 14 contaminants in Lake Meridian Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Lake Meridian Water District's water?

EPA monitoring detected Chloroform, TTHM, Bromodichloromethane, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Lake Meridian Water District serve?

Lake Meridian Water District reports serving 24,231 people in Washington, per its EPA record.

Has Lake Meridian Water District had any water quality violations?

The EPA has 8 violations on file for Lake Meridian Water District, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.