East Moriches, NY Water Safety: 60/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Public water data for East Moriches, NY reveals a split picture — tap water quality varies meaningfully by service area and the city's grade reflects that variability.
How East Moriches Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About East Moriches Water
- Homes built before 1986: 60% — older plumbing may contain lead solder.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 11.13.
Who Supplies Your Water in East Moriches
2 water utilities share the residential service territory in East Moriches, NY — out of 2 total systems in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in East Moriches, New York (population ~5,508), covering 2 community water systems serving approximately 1,103,500 people region-wide.
No EPA violations recorded across any ZIP codes in East Moriches — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for East Moriches: C (60/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
East Moriches water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for East Moriches
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 11940 | C | SUFFOLK COUNTY WATER AUTHORITY | 1,100,000 |
All ZIP Codes in East Moriches
- 11940 [C]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in East Moriches
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in East Moriches
With 60% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Two dates define the high-risk tiers of residential plumbing from a lead standpoint: 1970, before which lead pipes were commonly installed for service connections, and 1986, before which lead solder was standard in copper plumbing. A median build year of 1971 places East Moriches's housing distribution well within that older risk zone. The bar chart above breaks down how much of the stock falls into each era — and the pre-1986 share alone represents more than half the residential inventory, making plumbing-era risk a defining characteristic of the local water safety picture.
Over half of homes in East Moriches were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for East Moriches Homeowners
Within the East Moriches market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in East Moriches are relatively low compared to home values. The $1,200–$2,500 estimated range is a small fraction of median property value. Home values are 73% above the New York average.
Lead Exposure Risk for Children in East Moriches
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Reading the local data together points toward a structural gap that matters more here than in low-exposure communities. 60% of East Moriches stock comes from the pre-rule era, and citywide monitoring either approaches or sits beyond the federal benchmark under Lead and Copper Rule sampling. A baseline kit fits the routine-diligence category, with certified filtration available via retailer networks where confirmed faucet results warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in East Moriches
Flood history in East Moriches spans 174 NFIP claims and 100% flood zone coverage — enough to place it in moderate-exposure territory where flood events are genuinely recurring rather than statistical outliers. That distinction matters for water quality assessment because the connection between flooding and water safety is not uniform across communities. In low-exposure areas, flooding rarely generates the conditions needed to compromise treatment or distribution infrastructure. In high-exposure areas, it can do so repeatedly. Moderate-exposure communities sit in between: flood events occur with enough frequency to make periodic infrastructure stress a reasonable concern, particularly for private well owners and residents in lower-elevation FEMA-designated zones.
East Moriches has a moderate flood history with 174 FEMA claims averaging $25,431 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,800</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in East Moriches
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 60% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for East Moriches, NY