County water report

Laramie County Water Report

Drinking-water compliance, watershed health, monitoring records, and river conditions for Laramie County, Wyoming.

Water grade

Water score

46.7

State rank

of 23

Health violations

EPA SDWIS, 5-year lookback

Watershed impaired

Not reported

EPA ATTAINS coverage varies by state

Monitoring sites

752 recent measurements

Live streamflow

No gauge

Primary USGS station not mapped

Water at a glance

Key Water Indicators for Laramie County

EPA SDWIS

Safety Grade

Score: 46.7 / 100

EPA SDWIS

Active Violations

5-year health-based lookback

EPA ATTAINS

Watershed Health

Not reported

Coverage varies by state

USGS NWIS

Streamflow Snapshot

No gauge

Primary USGS gauge not mapped

EPA WQP

Monitoring Sites

752 recent readings

Source: EPA SDWIS · Safe Drinking Water Information System

Drinking Water Compliance

Compliance grade

Based on EPA SDWIS compliance history.

Water score

Higher scores indicate cleaner recent compliance records.

46.7/100

Health violations

Health-based violations

Violations per 100K served

21.0

Population-normalized SDWIS rate

Data center water stress

Laramie County has 22 facilities in the DCWSI dataset.

ByCounty's DCWSI ranks this county #95 nationally by combining its water score with mapped data center density.

DCWSI

65.5

0-100 index

Facility count

93.6 density percentile

Discharge estimate

Not reported

EPA CWA fields where available

Water vs median

-3.3

Compared with US county median

Named operators

MicrosoftMeta

Mapped facilities

CYS41 Datacenter
Microsoft
OSM
CYS42 Datacenter
Microsoft
OSM
Meta Cheyenne Data Center
Meta
OSM
MICROSOFT CHEYENNE DATA CENTER
LARAMIE · Microsoft
EPA ECHO
MICROSOFT CHEYENNE DATA CENTER CYS13 & CYS14 (MICROSOFT CORP)
LARAMIE COUNTY · Microsoft
EPA ECHO
MICROSOFT CHEYENNE DATA CENTER CYS17 - CYS22 (MICROSOFT CORP)
LARAMIE COUNTY · Microsoft
EPA ECHO

16 more mapped facilities included in the county score.

See the Laramie County data-center report Review methodology

Data Center Water Budget Calculator

Estimate daily water use for a hypothetical facility in Laramie County.

Facility size: 100 MW

1 MW1,000 MW

Cooling type

Utilization: 70%

40%100%

799K gallons/dayHigh Impact

Your facility would use 64.4% of this county's industrial water baseline. Verify water rights and long-term drought projections before committing.

64.4% of county industrial baseline0.44 Mgal/day remaining headroom

Based on USGS 2020 water-use data and EPA-standard cooling intensity constants. Not a substitute for site-specific water rights analysis.

Editorial analysis

Understanding Laramie County’s Water

Drinking Water Quality Overview

EPA SDWIS

Laramie County's drinking water received a D grade, scoring 46.7 out of 100. Over the past five years, EPA SDWIS records 18 health-based violations — a pattern that public water utilities are required to disclose and correct.

Monitoring Network

EPA WQP

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Laramie County has limited coverage with 7 active monitoring sites with 752 recent measurements on record. Predominant monitoring categories include organics, pesticide and organics, other. More monitoring sites generally indicate greater scientific attention to local water conditions — and provide the baseline data that regulators use to set future impairment listings.

Editorial advisory

What the data suggests for Laramie County

Water Verdict

Laramie County receives a below-average water quality assessment with a grade of D and a score of 46.7 out of 100. Residents should review their utility's Consumer Confidence Report and may want to consider additional water filtration for drinking.

Violation Context

Laramie County has recorded 18 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 21.0 violations per 100,000 people served, this rate is high and signals significant water quality management issues.

Consumer Guidance

Laramie County's drinking-water compliance is below average with a Grade D, indicating repeated or unresolved violations in the recent record. Laramie County's drinking-water compliance score is 46.7 out of 100. The violation rate for Laramie County is 21.0 per 100,000 people served. Residents are encouraged to use an NSF 53 or NSF 58-certified filter for drinking and cooking water until the underlying violations are resolved. Running tap water for 30 seconds before use and avoiding older lead-pipe connections can also reduce exposure risk. The current Consumer Confidence Report from your utility will specify the contaminants of concern. There are 7 active water-quality monitoring sites in Laramie County.

Regional Context

Laramie County has better water quality than the average county in Wyoming. Its water score is 10.1 points higher than the state average, indicating stronger water system performance relative to neighboring counties.

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

Contaminants & Resources

Key issues flagged in Laramie County's water environment

Official EPA Resources for Laramie County

EPA How's My Waterway

Interactive watershed health data for Laramie County

EPA ECHO: Drinking Water Systems

Search water utilities and violation records for Laramie County

Consumer Confidence Reports (WY)

Annual water quality reports from utilities in Wyoming

Past 5 years

Water Quality Monitoring

Monitoring Sites

Active in the past 5 years

Measurements Recorded

752

752 total readings

Most Measured

Organics, Pesticide
Organics, Other
Physical

Categories measured most frequently

Data from the EPA Water Quality Portal (WQP), aggregating monitoring records from federal, state, and tribal sources. Each measurement represents a single sample analyzed for a specific characteristic (e.g., E. coli, pH, dissolved oxygen, nitrogen).

Free tool

Estimate Your Water Costs

Water Cost Estimate

Household size

3 people · ~225 gal/day

Filter type

Annual Total

$558

Monthly

$47

Water Bill

$558/yr

Filter Cost

$0/yr

Safety Grade for Laramie County:D — Poor

Elevated violations or significant watershed impairment.

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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Frequently Asked Questions

What is the water quality in Laramie County, Wyoming?

Laramie County, Wyoming has a drinking-water quality grade of D with a score of 46.7/100, based on EPA SDWIS compliance data. The county has 18 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and streamflow snapshots are reported separately on this page.

Are there any water violations in Laramie County?

Laramie County has 18 health-based drinking water violations recorded by the EPA over the past 5 years. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.

How much water-quality monitoring happens in Laramie County?

EPA's Water Quality Portal records 752 measurements from 7 monitoring sites in Laramie County over the past five years. The most frequently measured characteristic groups are Organics, Pesticide, Organics, Other, Physical. Each measurement is a single sample analyzed for one characteristic (E. coli, pH, dissolved oxygen, etc.). High monitoring density means more scientific evidence behind any reported signal — it does not by itself indicate water quality.

How does Laramie County water compare to the Wyoming average?

Laramie County's SDWIS water quality score of 46.7/100 is higher than the Wyoming state average of 36.6. The average water quality grade across Wyoming is F, based on data from 23 counties with available SDWIS data.

Is tap water safe to drink in Laramie County?

Based on EPA SDWIS data, Laramie County has a water quality grade of D (46.7/100). This indicates below-average compliance with significant violations. Residents may want to consider home water filtration or independent testing. 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).

Why does Laramie County have so many water violations?

Laramie County has 18 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.

How does Laramie County rank for water quality in Wyoming?

Laramie County ranks #7 out of 23 counties in Wyoming by SDWIS water quality score (1 = best). With a score of 46.7/100, it falls in the top third of counties statewide. The ranking reflects EPA SDWIS compliance only — not watershed impairment, monitoring density, or streamflow, which are tracked separately on this page.

Counties with Similar Water Quality

Converse County

Wyoming

47.9

Water score

Hot Springs County

Wyoming

44.6

Water score

Sweetwater County

Wyoming

43.8

Water score

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.

Water-quality monitoring counts from the EPA Water Quality Portal (WQP), federated USGS, EPA, and state agency sampling records over a rolling 5-year window.

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 May 14, 2026Reviewed by Evan Brooks, Data Editor

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