A
93

US Water Score: A

Mexico, NY 13114

Oswego County · Population served: 3,950 · Data updated July 2026

Service-area evidence: EPA service-area records associate the listed system with this ZIP. Boundaries may still overlap or change.

Water Systems Serving This Area

🌊
RICHLAND TOWN PWS
Groundwater · Pop. 3,950
PWSID: NY3730165
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MEXICO VILLAGE
Groundwater · Pop. 2,100
PWSID: NY3704359
🌊
MEXICO TOWN WD #1
Groundwater · Pop. 500
PWSID: NY3730182

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
3.7
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

12Total (5yr)
0Health-Based
9Major

Water Quality Summary

Understanding Your Water in Mexico

Tap water quality in Mexico, New York (13114) receives an overall grade of A (Lower record-based concern) with a score of 93 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 7 points above the New York state average of 86. Compared to the national average (75), this area performs significantly better. The area is served by 3 water systems providing water to approximately 3,950 people, using groundwater sources. Testing has found elevated levels of Lead that warrant attention. The area has 12 violations over the past 5 years, though none were classified as health-based.

Your Score 93/100 A
vs State 7 pts above New York avg (86)
vs National 18 pts above national avg (75)

What a Grade A Means

A score of 93/100 means public water-system records for Mexico, NY show relatively few concerns in the US Water Score model. This is an internal score, not an EPA safety rating, and it does not guarantee conditions at any specific tap.

Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on public water-system records, Mexico, New York receives an internal US Water Score grade of A (Lower record-based concern) with a score of 93/100. This indicates relatively few system-level concerns in our model, but it is not an EPA safety rating and does not guarantee tap conditions inside individual homes.

ZIP code 13114 is served by 3 water systems using groundwater sources, providing water to approximately 3,950 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

Lead was reported at 3.7 ppb in public-system records for Mexico, New York. This is below the currently applicable EPA action level of 15 ppb, but may be above more protective health guidance; EPA's future LCRI action level is 10 ppb. Household plumbing can materially change tap-level exposure, so consider certified filtration and individual tap testing, especially where children are present.

No PFAS ("forever chemicals") were detected in water systems serving Mexico, New York during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Mexico, New York have received 12 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Mexico, New York should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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