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Tap water quality report

Guide Meridian Water Association

EPA monitoring tested this supplier for 74 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
11
detected
258
people served
4
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Private
Counties served
Whatcom

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.

4
health-based violations
34
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2004-10-01 → 2004-10-31
MCL Health-based Archived 1991-11-01 → 1991-11-30
MCL Health-based Archived 1991-11-01 → 1991-11-30
MCL Health-based Archived 1991-11-01 → 1991-11-30
MR Monitoring Archived 2006-12-01 → 2006-12-31
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01
MR Monitoring Resolved 2005-01-01

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
4700 µg/L 47%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2025
Bromodichloromethane
1.4 µg/L
No EPA limit set
 4/6 SYR4 2013–2017
Dibromochloromethane
1.9 µg/L
No EPA limit set
 4/6 SYR4 2013–2017
TTHM
4.9 µg/L 6.1%
of the EPA limit 80 µg/L
 4/4 SYR4 2013–2017
Chloroform
0.9000 µg/L
No EPA limit set
 3/4 SYR4 2013–2017
Bromoform
0.7000 µg/L
No EPA limit set
 2/6 SYR4 2013–2017
Dibromoacetic Acid
1.7 µg/L
No EPA limit set
 2/3 SYR4 2013–2017
Nitrate-Nitrite
2400 µg/L 24%
of the EPA limit 10000 µg/L
 2/2 SYR4 2015
Total Haloacetic Acids (HAA5)
1.7 µg/L 2.8%
of the EPA limit 60 µg/L
 2/3 SYR4 2013–2017
Gross Beta Particle Activity
0.6050 pCi/L
No EPA limit set
 1/1 SYR4 2015
63 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
John Mercer

Frequently asked questions about Guide Meridian Water Association

Is Guide Meridian Water Association tap water safe to drink?

EPA monitoring detected 11 contaminants in Guide Meridian Water Association'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 Guide Meridian Water Association's water?

EPA monitoring detected Nitrate, Lead, Bromodichloromethane, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does Guide Meridian Water Association serve?

Guide Meridian Water Association reports serving 258 people in Washington, per its EPA record.

Has Guide Meridian Water Association had any water quality violations?

The EPA has 34 violations on file for Guide Meridian Water Association, of which 4 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.