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WaterSafeCheck

ZIP Code 99658 Water Quality Report

Saint Marys, AK · Wade Hampton Census Area County

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

2

Total Violations

46

Lead Risk

Moderate

Contaminants

2

About Tap Water in ZIP Code 99658

Tap water in ZIP code 99658 (Saint Marys, AK) meets all federal safety standards and earns a solid B grade (score: 75/100). Served by St. Marys Water System, the water system has maintained general compliance with EPA Safe Drinking Water Act regulations, with only minor issues on record.

Water System

St. Marys Water System

EPA ID: AK2270176

Water Source

Surface Water

Population Served

548 residents

County

Wade Hampton Census Area County, Alaska

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Lead Levels in ZIP 99658

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

Lead Data Not Available

Lead testing data was not found in EPA records for ZIP code 99658. This may occur with very small systems or systems that report under a parent utility. Contact St. Marys Water System directly to request lead testing results or a copy of their Consumer Confidence Report.

Lead exposure risk in 99658 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.

Copper Level (90th percentile)

EPA action level: 1.3 mg/L

2.024 mg/L
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

St. Marys Water System has recorded 2 health-based violations in the past 5 years. Multiple health violations suggest recurring compliance challenges. Residents should request a copy of the annual Consumer Confidence Report to understand what contaminants were involved and what corrective actions were taken. 26 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)
46
Health-Based Violations
2
Unresolved Violations
26
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. St. Marys Water System has an extensive history of unresolved violations and enforcement actions. Independent water testing is highly recommended.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 2 contaminants associated with health-based violations in ZIP code 99658: Fecal Coliform, E. coli. These contaminants exceeded the Maximum Contaminant Levels (MCLs) established by the EPA under the Safe Drinking Water Act at some point in the 5-year monitoring period. The presence of these violations does not necessarily mean water is currently unsafe — water systems are often required to increase monitoring and treatment when violations occur. Review the annual Consumer Confidence Report for the most current status.

Fecal ColiformE. coli

⚖ Enforcement Actions

10 enforcement actions have been issued against St. Marys Water System — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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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
Energy Burden

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

9.36%

🛡 What Should You Do? — ZIP 99658 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from St. Marys Water System
  • ✓ 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 99658 Water Quality

Is tap water safe to drink in ZIP code 99658?+
Yes — tap water in 99658 (Saint Marys, AK) 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 99658 tap water?+
Lead level data from EPA monitoring is not available for 99658. Contact St. Marys Water System directly for the most recent lead testing results.
Who provides tap water to 99658?+
Tap water in ZIP code 99658 is provided by St. Marys Water System (EPA ID: AK2270176). This system serves approximately 548 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 99658?+
ZIP code 99658 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 99658 have any active water quality violations?+
Yes — there are currently 26 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact St. Marys Water System for the latest update.
How do I get a copy of my water quality report for 99658?+
Your water utility — St. Marys Water System — 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 "St. Marys Water System Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 99658?+
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 99658, with detected contaminants including Fecal Coliform and E. coli, a multi-stage filter or reverse osmosis system is recommended.
Is 99658 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Current EPA data for 99658 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 99658 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 St. Marys Water System. 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 →