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Tap water quality report

Sno Pud 1 - Lake Stevens

EPA monitoring tested this supplier for 103 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
17
detected
67,710
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Local government
Counties served
Snohomish

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.

1
health-based violations
25
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1995-07-01 → 1995-07-31
Other Monitoring Resolved 2023-07-01
Other Monitoring Resolved 2021-07-01
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31
MR Monitoring Archived 2014-01-01 → 2022-12-31

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
46.11 µg/L
No EPA limit set
worst single sample: 69.4 µg/L
174/180 SYR4 2012–2019
TTHM
48.22 µg/L 60%
of the EPA limit 80 µg/L
worst single sample: 72.4 µg/L
173/173 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
40.92 µg/L 68%
of the EPA limit 60 µg/L
worst single sample: 47.8 µg/L
170/172 SYR4 2012–2019
Trichloroacetic Acid
25.065 µg/L
No EPA limit set
worst single sample: 27.7 µg/L
168/170 SYR4 2012–2019
Dichloroacetic Acid
17.35 µg/L
No EPA limit set
worst single sample: 20.2 µg/L
167/170 SYR4 2012–2019
Bromodichloromethane
2.2 µg/L
No EPA limit set
worst single sample: 3 µg/L
149/155 SYR4 2012–2019
Monochloroacetic Acid
5.095 µg/L
No EPA limit set
worst single sample: 5.6 µg/L
28/162 SYR4 2012–2019
Nitrate
130 µg/L 1.3%
of the EPA limit 10000 µg/L
 6/32 SYR4 2013–2019
Barium
13.2 µg/L 0.7%
of the EPA limit 2000 µg/L
worst single sample: 14 µg/L
5/5 SYR4 2013–2016
Copper
10.12 µg/L 0.8%
of the EPA limit 1300 µg/L
worst single sample: 11 µg/L
5/5 SYR4 2013–2016
Dibromochloromethane
1.22 µg/L
No EPA limit set
worst single sample: 1.3 µg/L
5/180 SYR4 2012–2019
Fluoride
550 µg/L 14%
of the EPA limit 4000 µg/L
worst single sample: 590 µg/L
5/5 SYR4 2013–2016
Lead
0.0032 mg/L 21%
of the EPA limit 0.0150 mg/L
 4/4 LCR 2024
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 2/2 SYR4 2013–2016
Dibromoacetic Acid
22 µg/L
No EPA limit set
 1/173 SYR4 2012–2019
Gross Beta Particle Activity
1.02 pCi/L
No EPA limit set
 1/4 SYR4 2015
Nitrate-Nitrite
120 µg/L 1.2%
of the EPA limit 10000 µg/L
 1/5 SYR4 2013–2016
86 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Karen Latimer

Frequently asked questions about Sno Pud 1 - Lake Stevens

Is Sno Pud 1 - Lake Stevens tap water safe to drink?

EPA monitoring detected 17 contaminants in Sno Pud 1 - Lake Stevens'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 Sno Pud 1 - Lake Stevens's water?

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

How many people does Sno Pud 1 - Lake Stevens serve?

Sno Pud 1 - Lake Stevens reports serving 67,710 people in Washington, per its EPA record.

Has Sno Pud 1 - Lake Stevens had any water quality violations?

The EPA has 25 violations on file for Sno Pud 1 - Lake Stevens, of which 1 is 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.