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Northwest Hills Planning Region Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Northwest Hills Planning Region, Connecticut.

Water grade

N/A

Water score

N/A

State rank

N/A

Health violations

N/A

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

N/A

EPA Water Quality Portal

Live streamflow

73%

HOUSATONIC RIVER AT FALLS VILLAGE, CT

Water at a glance

Key Water Indicators for Northwest Hills Planning Region

EPA SDWIS

Safety Grade

N/A

Insufficient data

EPA SDWIS

Active Violations

N/A

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

73% of mean

HOUSATONIC RIVER AT FALLS VILLAGE, CT

EPA WQP

Monitoring Sites

N/A

Rolling 5-year window

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Editorial analysis

Understanding Northwest Hills Planning Region’s Water

Drinking Water Quality Overview

EPA SDWIS

Northwest Hills Planning Region has limited drinking water data on file. Violation data are unavailable for this county.

River & Streamflow Status

USGS NWIS

USGS NWIS gauge data (as of 2026-05-14T14:15:00.000-04:00) puts HOUSATONIC RIVER at 825.0 cfs — running somewhat below its historical average at 73% of mean. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

Editorial advisory

What the data suggests for Northwest Hills Planning Region

Water Verdict

Northwest Hills Planning Region does not have sufficient EPA SDWIS water quality data to determine an overall assessment. Residents should contact their local water utility for the most recent Consumer Confidence Report.

Violation Context

Health-based violation data is not available for Northwest Hills Planning Region. EPA health violations occur when water systems exceed allowable contaminant levels or fail to meet treatment requirements. Residents should request the latest Consumer Confidence Report from their water provider.

Consumer Guidance

Drinking-water compliance data is not yet available for Northwest Hills Planning Region in the EPA SDWIS system, which is common for rural areas and census areas served by private wells or small tribal systems. Residents should contact their local utility or state drinking-water agency for the most current Consumer Confidence Report. Using an NSF-certified filter (look for certifications against ANSI/NSF 53 or 58) can provide additional safety margin for any unconfirmed contaminants. A pipeline streamflow snapshot from the HOUSATONIC RIVER gauge is also available on this page.

Regional Context

State-level water quality comparison data is not available for Northwest Hills Planning Region. When data is available, this section will show how the county's water quality compares to other counties in Connecticut.

Advisory text summarizes county-level public records and is not a replacement for your utility's current Consumer Confidence Report or direct local notices.

Live USGS Streamgage

River & Stream Conditions

Current Discharge

825cfs

May 14, 6:15 PM UTC

vs Long-Term Average

73%

Below typical

Primary Streamgage

HOUSATONIC RIVER AT FALLS VILLAGE, CT

USGS site
01199000
Drainage area
634 sq mi
Long-term mean
1,127 cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges; this view summarizes the primary one. The long-term mean is the full-record annual average; the percent-of-typical value compares the latest reading against that average.

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Water Cost Estimate

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3 people  ·  ~225 gal/day

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Northwest Hills Planning Region:F — Failing

High violation count or severe watershed conditions.

Estimates use the national average residential water rate ($0.0068/gal, EPA/AWWA 2023) and EPA WaterSense per-person consumption baseline (75 gal/person/day). Actual bills vary by utility, usage tier, and local infrastructure fees. For informational purposes only.

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Northwest Hills Planning Region has good water quality

Learn about water restrictions and conservation in your area.

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Frequently Asked Questions

What is the water quality in Northwest Hills Planning Region, Connecticut?
Northwest Hills Planning Region, Connecticut has a drinking-water quality grade of N/A with a score of N/A/100, based on EPA SDWIS compliance data. Compliance data is currently unavailable. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.
Are there any water violations in Northwest Hills Planning Region?
Violation data for Northwest Hills Planning Region is not currently available. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs).
What's happening with rivers in Northwest Hills Planning Region right now?
Northwest Hills Planning Region's primary USGS streamgage on the HOUSATONIC RIVER has a pipeline snapshot of 825 cubic feet per second — 73% of the long-term mean of 1,126.73 cfs. Flow is within typical range for this gauge. For the latest gauge feed, visit waterdata.usgs.gov.
How does Northwest Hills Planning Region water compare to the Connecticut average?
Northwest Hills Planning Region's SDWIS water quality score of N/A/100 is not available for comparison.
Is tap water safe to drink in Northwest Hills Planning Region?
Based on EPA SDWIS data, Northwest Hills Planning Region has a water quality grade of N/A (N/A/100). Insufficient data is available to fully assess compliance. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Does Northwest Hills Planning Region have clean drinking water?
Northwest Hills Planning Region has no reported health-based drinking water violations according to EPA records. With a water quality score of N/A/100 and grade N/A, the county's drinking water has had some compliance issues but continues to be monitored. Note: drinking-water compliance speaks to the public water system, not necessarily to the watershed itself — check the Watershed Health zone for ATTAINS §303(d) data.
How is water quality measured?
WaterByCounty layers four federal datasets per county. The A–F drinking-water grade comes from EPA SDWIS (Safe Drinking Water Act compliance, 5-year violation lookback). The Watershed Health zone surfaces EPA ATTAINS §303(d) impairment data. The Monitoring zone summarizes EPA Water Quality Portal records. The Streamflow zone reports the latest USGS NWIS reading from the county's primary streamgage. Each is reported separately so you can see where the water is actually weakest.

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Live streamflow from the USGS National Water Information System (NWIS), continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor

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