St. Lawrence County, New York
45 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-04
Safe water is the norm for most of St. Lawrence County's 45 ZIP codes — but a notable subset have documented violations that push the grade to the middle tier.
How St. Lawrence County Compares
How St. Lawrence County Compares
St. Lawrence County scores 8 points above the New York state average (61/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: St. Lawrence County, New York
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.2 (asthma 11.7%, diabetes 11.9%)
Estimated additional annual cost per homeowner: $943, driven primarily by energy_code_gap
Infrastructure: 0.461% avg pipe failure probability, 88% of ZIPs at high risk
69% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $943
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
50,207 housing units in St. Lawrence County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in St. Lawrence County
Remediation costs are relatively manageable for most homeowners in St. Lawrence County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for St. Lawrence County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in St. Lawrence County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | NORFOLK WATER DISTRICT | 2,300 | 63 |
| 2 | Norwood | 1,685 | 63 |
| 3 | Waddington Village | 944 | 51 |
| 4 | Potsdam Village | 8,312 | 42 |
| 5 | Crescent Meadow Apt Community | 30 | 36 |
37 total water systems serve St. Lawrence County.
All ZIP Codes in St. Lawrence County
45 ZIP codes tracked in St. Lawrence County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 13625 | Colton | 83 | B | 0 | $162K |
| 2 | 13635 | Edwards | 83 | B | 0 | $96K |
| 3 | 13652 | Hermon | 83 | B | 0 | $97K |
| 4 | 13654 | Heuvelton | 83 | B | 0 | $128K |
| 5 | 13668 | Norwood | 83 | B | 0 | $120K |
| 6 | 13672 | Parishville | 83 | B | 1 | $93K |
| 7 | 13695 | Wanakena | 83 | B | 0 | $233K |
| 8 | 13639 | Fine | 82 | B | 2 | — |
| 9 | 13660 | Madrid | 82 | B | 2 | $121K |
| 10 | 13662 | Massena | 82 | B | 2 | $118K |
| 11 | 13690 | Star Lake | 82 | B | 2 | $82K |
| 12 | 13694 | Waddington | 81 | B | 5 | $208K |
| 13 | 13613 | Brasher Falls | 80 | B | 6 | $117K |
| 14 | 12973 | Piercefield | 79 | B | 9 | $99K |
| 15 | 13664 | Morristown | 79 | B | 2 (1 health) | $149K |
| 16 | 13642 | Gouverneur | 78 | B | 1 | $116K |
| 17 | 13647 | Hannawa Falls | 78 | B | 11 | — |
| 18 | 13669 | Ogdensburg | 78 | B | 8 | $102K |
| 19 | 13670 | Oswegatchie | 78 | B | 8 | $62K |
| 20 | 13680 | Rensselaer Falls | 78 | B | 10 | $135K |
| 21 | 13617 | Canton | 75 | B | 16 | $149K |
| 22 | 13658 | Lisbon | 68 | C | 14 | $114K |
| 23 | 13676 | Potsdam | 68 | C | 13 | $149K |
| 24 | 13699 | Potsdam | 66 | C | 13 | — |
| 25 | 13667 | Norfolk | 65 | C | 30 | $111K |
| 26 | 12927 | Cranberry Lake | 63 | C | 0 | — |
| 27 | 13646 | Hammond | 63 | C | 0 | $133K |
| 28 | 13677 | Pyrites | 63 | C | 0 | — |
| 29 | 13681 | Richville | 63 | C | 0 | $73K |
| 30 | 13684 | Russell | 63 | C | 0 | $111K |
| 31 | 13696 | West Stockholm | 63 | C | 0 | — |
| 32 | 13697 | Winthrop | 63 | C | 0 | $145K |
| 33 | 12922 | Childwold | 53 | D | 0 | $194K |
| 34 | 12949 | Lawrenceville | 53 | D | 0 | — |
| 35 | 12965 | Nicholville | 53 | D | 0 | $89K |
| 36 | 12967 | North Lawrence | 53 | D | 0 | $96K |
| 37 | 13614 | Brier Hill | 53 | D | 0 | — |
| 38 | 13621 | Chase Mills | 53 | D | 0 | $160K |
| 39 | 13630 | De Kalb Junction | 53 | D | 0 | $85K |
| 40 | 13633 | De Peyster | 53 | D | 0 | $90K |
| 41 | 13645 | Hailesboro | 53 | D | 0 | — |
| 42 | 13649 | Helena | 53 | D | 0 | — |
| 43 | 13666 | Newton Falls | 53 | D | 0 | $48K |
| 44 | 13678 | Raymondville | 53 | D | 0 | — |
| 45 | 13687 | South Colton | 53 | D | 0 | $166K |
Recommended Buyer Guides for St. Lawrence County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 69% of homes built before 1978
Deep Dive Reports
Detailed analysis for St. Lawrence County, New York
Overview
St. Lawrence County in New York covers 45 ZIP codes with an average Home Safety Score of C (69/100).
19 of 45 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to New York water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.