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WaterSafeCheck

ZIP Code 98037 Water Quality Report

Lynnwood, WA · Snohomish County County

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

0

Total Violations

3

Lead Risk

Moderate

Contaminants

0

About Tap Water in ZIP Code 98037

Tap water in ZIP code 98037 (Lynnwood, WA) meets all federal safety standards and earns a solid B grade (score: 81/100). Served by Alderwood Water District, the water system has maintained general compliance with EPA Safe Drinking Water Act regulations, with only minor issues on record.

Water System

Alderwood Water District

EPA ID: WA5301300

Water Source

Surface Water

Population Served

200,000 residents

County

Snohomish County County, Washington

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Lead Levels in ZIP 98037

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level (CCR Report): 4.0 ppb

According to the Consumer Confidence Report for 98037, the 90th percentile lead level is 4.0 ppb. This is at a low level, well below the EPA action level of 15 ppb.

Lead exposure risk in 98037 is rated Moderate. EPA models estimate a 44% probability of lead exposure risk in this ZIP code based on housing age, infrastructure age, and water system data. This may reflect a mix of older and newer housing stock and infrastructure. Families with young children should test their home's water and consider a certified NSF/ANSI 53 water filter.

Lead (Consumer Confidence Report)

From annual CCR filing

4 ppb
Copper (Consumer Confidence Report)

From annual CCR filing

0.1 ppb
Lead Exposure Risk Rating
Moderate
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

44%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

Alderwood Water District has recorded 3 violations, but none are health-based. Administrative or reporting violations don't directly indicate unsafe water, but they do signal gaps in documentation or monitoring procedures. 3 violations are currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
3
Health-Based Violations
0
Unresolved Violations
3
Boil Water Advisories
0
Compliance Risk
Moderate

Regulatory compliance risk is rated Moderate. Alderwood Water District has had occasional lapses in compliance but generally meets Safe Drinking Water Act requirements.

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Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 98037. This means EPA monitoring has not found levels of regulated contaminants exceeding the Maximum Contaminant Levels (MCLs) set under the Safe Drinking Water Act — a positive indicator of water quality compliance.

From Consumer Confidence Report:

Haloacetic Acid HAA5 (39.6 ppb); Trihalomethane (TTHM) (55.1 ppb)

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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type
Surface Water
CCR Source Classification
Surface Water
EPA Radon Zone

Lower potential

Zone 3
Annual Flood Risk Cost

Estimated annual flood-related costs per property

$0
Energy Burden

% of household income spent on energy — indicator of older infrastructure

2.57%

EPA Radon Zone 3 — lower radon potential, though the EPA still recommends testing all homes.

🛡 What Should You Do? — ZIP 98037 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from Alderwood Water District
  • ✓ If your home was built before 1986, consider testing your own tap for lead
  • ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste

Frequently Asked Questions — ZIP 98037 Water Quality

Is tap water safe to drink in ZIP code 98037?+
Yes — tap water in 98037 (Lynnwood, WA) currently meets all federal EPA standards with a water safety grade of B. No health-based violations are on record in the past 5 years. You can drink your tap water with confidence, though running the tap for 30 seconds in the morning is always a good practice.
What is the lead level in 98037 tap water?+
Lead level data from EPA monitoring is not available for 98037. Contact Alderwood Water District directly for the most recent lead testing results.
Who provides tap water to 98037?+
Tap water in ZIP code 98037 is provided by Alderwood Water District (EPA ID: WA5301300). This system serves approximately 200,000 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 98037?+
ZIP code 98037 is served by surface water. Surface water systems draw from rivers, lakes, or reservoirs and must meet strict EPA treatment requirements including filtration and disinfection.
Does 98037 have any active water quality violations?+
Yes — there are currently 3 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact Alderwood Water District for the latest update.
How do I get a copy of my water quality report for 98037?+
Your water utility — Alderwood Water District — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "Alderwood Water District Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 98037?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 98037, with a clean compliance record, a standard carbon block filter meeting NSF/ANSI 42 is a good choice for taste and as a precaution.
Is 98037 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Current EPA data for 98037 shows no available lead data — we recommend using a certified NSF/ANSI 53 lead filter as a precaution for infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 98037 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Alderwood Water District. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →