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Rensselaer County, NY Water Quality

Water quality data for 14 public water systems serving Rensselaer County, New York — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 14 water systems · 17 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Rensselaer County Earns a B

Rensselaer County: 17 communities across 14 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.70 ppb
  • 16 communities with a lead detection, 1 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 6 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.7 ppb
Median Lead Level
County-wide, 90th percentile
14
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Schodack
    2.00 ppb
    No federal limits exceeded on record
    B
  • Sand Lake
    1.00 ppb
    No federal limits exceeded on record
    B
  • Berlin
    3.10 ppb
    No federal limits exceeded on record
    B
  • Petersburgh
    2.00 ppb
    No federal limits exceeded on record
    B
  • East Greenbush
    2.30 ppb
    2 health-based violations since 2015
    A
⚠ Needs Attention
  • Brunswick
    7.60 ppb
    Copper above the 1,300 ppb action level
    D
  • Poestenkill
    2.00 ppb
    1 significant inspection deficiency
    C
  • Troy
    10.60 ppb
    3 health-based violations since 2015
    B
  • Rensselaer
    6.60 ppb
    4 health-based violations since 2015
    B
  • Schaghticoke
    10.60 ppb
    3 health-based violations since 2015
    B
County Lead Level — Median 2.7 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.7 ppb — 18% of the federal action level
Systems by Lead Level
Under 5 ppb
9
5 – 10 ppb
5
10 – 15 ppb
2
No Data
1

All Cities in Rensselaer County

Troy 10.60 ppb B
East Greenbush 2.30 ppb A
North Greenbush Not detected B
Rensselaer 6.60 ppb B
Brunswick 7.60 ppb D
Hoosick 1.00 ppb A
Schodack 2.00 ppb B
Nassau 6.40 ppb B
Nassau 6.40 ppb B
Schaghticoke 10.60 ppb B
Sand Lake 1.00 ppb B
Berlin 3.10 ppb B
Poestenkill 2.00 ppb C
Pittstown 1.00 ppb B
Stephentown 1.00 ppb B
Petersburgh 2.00 ppb B
Nassau Lake 6.40 ppb B
Showing 17 cities
No active violations Active violations

About Rensselaer County Drinking Water

Rensselaer County is served by 14 water systems covering 17 communities. No community here has an open violation on record.

Of the communities reporting lead results, 16 recorded a detection, with a median of 2.70 ppb — 18% of the federal action level. 1 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 6 of them.

Frequently Asked Questions

Is Rensselaer County tap water safe to drink?▼
No community in Rensselaer County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Rensselaer County?▼
Among communities with a detection the median is 2.70 ppb, 18% of the 15 ppb action level. 1 reported none detected and 0 reported no result.
How many water systems serve Rensselaer County?▼
14 community water systems serve 17 communities here.
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