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City water profile

Water hardness in Denver

Find official utility reports, understand hardness, and check the water system serving your home in Denver, Colorado.

Utility-reported hardness

Not yet available

Check your provider and source →
State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
3
Active health records
0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →
Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Advenir French Quarter

CO0116104 · Surface water · 3,447 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0 mg/L
Action level
0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Violation history (5)
Imported violation history for Advenir French Quarter
RuleStatusPeriod
Lead and Copper RuleResolvedJan 1, 2024 to Jan 31, 2024
Public NoticeResolvedDec 28, 2022 to Feb 27, 2023
Lead and Copper RuleResolvedOct 1, 2022 to Jul 10, 2023
Public NoticeResolvedSep 28, 2022 to Feb 27, 2023
Public NoticeResolvedJun 28, 2022 to Feb 27, 2023

Garden Meadows

CO0101300 · Surface water · 250 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.001 mg/L
Action level
0.015 mg/L

7% of the listed benchmark

Monitoring period: Jan 1, 2024 to Dec 31, 2024

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Denver Water Board

CO0116001 · Surface water · 1,287,000 people served system-wide

A municipal system, in-state city, and served county all agree with this Census ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.0031 mg/L
Action level
0.015 mg/L

21% of the listed benchmark

Monitoring period: Jul 1, 2025 to Dec 31, 2025

Violation history (34)
Imported violation history for Denver Water Board
RuleStatusPeriod
Interim Enhanced Surface Water Treatment RuleResolvedMar 1, 2024 to Mar 31, 2024
Combined UraniumResolvedJan 1, 2024 to Mar 31, 2024
MethoxychlorArchivedJan 1, 2023 to Dec 31, 2025
ToxapheneArchivedJan 1, 2023 to Dec 31, 2025
DiquatArchivedJan 1, 2023 to Dec 31, 2025
DalaponArchivedJan 1, 2023 to Dec 31, 2025
OXAMYLArchivedJan 1, 2023 to Dec 31, 2025
Di(2-ethylhexyl) phthalateArchivedJan 1, 2023 to Dec 31, 2025
DinosebArchivedJan 1, 2023 to Dec 31, 2025
HexachlorocyclopentadieneArchivedJan 1, 2023 to Dec 31, 2025
Aldicarb sulfoneArchivedJan 1, 2023 to Dec 31, 2025
CarbofuranArchivedJan 1, 2023 to Dec 31, 2025
AtrazineArchivedJan 1, 2023 to Dec 31, 2025
Heptachlor epoxideArchivedJan 1, 2023 to Dec 31, 2025
2,4-DArchivedJan 1, 2023 to Dec 31, 2025
2,4,5-TPArchivedJan 1, 2023 to Dec 31, 2025
HEXACHLOROBENZENEArchivedJan 1, 2023 to Dec 31, 2025
PentachlorophenolArchivedJan 1, 2023 to Dec 31, 2025
PicloramArchivedJan 1, 2023 to Dec 31, 2025
Di(2-ethylhexyl) adipateArchivedJan 1, 2023 to Dec 31, 2025
Benzo(a)pyreneArchivedJan 1, 2023 to Dec 31, 2025
ETHYLENE DIBROMIDEArchivedJan 1, 2023 to Dec 31, 2025
EndrinArchivedJan 1, 2023 to Dec 31, 2025
ChlordaneArchivedJan 1, 2023 to Dec 31, 2025
HeptachlorArchivedJan 1, 2023 to Dec 31, 2025
Total Polychlorinated Biphenyls (PCB)ArchivedJan 1, 2023 to Dec 31, 2025
SimazineArchivedJan 1, 2023 to Dec 31, 2025
AldicarbArchivedJan 1, 2023 to Dec 31, 2025
Aldicarb sulfoxideArchivedJan 1, 2023 to Dec 31, 2025
1,2-DIBROMO-3-CHLOROPROPANEArchivedJan 1, 2023 to Dec 31, 2025
BHC-GAMMAArchivedJan 1, 2023 to Dec 31, 2025
LASSOArchivedJan 1, 2023 to Dec 31, 2025
EndothallArchivedJan 1, 2023 to Dec 31, 2025
Interim Enhanced Surface Water Treatment RuleResolvedSep 1, 2022 to Sep 30, 2022

City summary

What the indexed records say

Denver has 33 published ZIP profiles across Jefferson County and Denver County. The regional-evidence median is 349 PPM. The city does not meet the stricter comparison standard.

The 349–349 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard33 ZIPs

33 of 33 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
4.5 miles
Profiles with evidence
33/33

Confidence labels

High: 0Moderate: 0Low: 33

Observation window: May 8, 2026 to May 8, 2026.

ZIP directory

Water reports in Denver

Open a ZIP for site-level provenance and measurements.

ZIP code

80123

Very Hard

349 PPM

Nearest site
9.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80202

Very Hard

349 PPM

Nearest site
0.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80203

Very Hard

349 PPM

Nearest site
1.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80204

Very Hard

349 PPM

Nearest site
1.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80205

Very Hard

349 PPM

Nearest site
2.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80206

Very Hard

349 PPM

Nearest site
2.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80207

Very Hard

349 PPM

Nearest site
4.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80209

Very Hard

349 PPM

Nearest site
3.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80210

Very Hard

349 PPM

Nearest site
5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80211

Very Hard

349 PPM

Nearest site
2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80212

Very Hard

349 PPM

Nearest site
3.3 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80216

Very Hard

349 PPM

Nearest site
3.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80218

Very Hard

349 PPM

Nearest site
1.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80219

Very Hard

349 PPM

Nearest site
3.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80220

Very Hard

349 PPM

Nearest site
4.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80222

Very Hard

349 PPM

Nearest site
6.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80223

Very Hard

349 PPM

Nearest site
3.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80224

Very Hard

349 PPM

Nearest site
6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80230

Very Hard

349 PPM

Nearest site
6.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80231

Very Hard

349 PPM

Nearest site
7.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80235

Very Hard

349 PPM

Nearest site
8.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80236

Very Hard

349 PPM

Nearest site
6.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80237

Very Hard

349 PPM

Nearest site
8.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80238

Very Hard

349 PPM

Nearest site
6.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80239

Very Hard

349 PPM

Nearest site
9.4 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80246

Very Hard

349 PPM

Nearest site
4.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80247

Very Hard

349 PPM

Nearest site
7.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80249

Very Hard

349 PPM

Nearest site
17.9 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80264

Very Hard

349 PPM

Nearest site
0.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80266

Very Hard

349 PPM

Nearest site
6.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80290

Very Hard

349 PPM

Nearest site
0.7 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80293

Very Hard

349 PPM

Nearest site
0.6 mi
Confidence
Low

View full ZIP evidence →

ZIP code

80294

Very Hard

349 PPM

Nearest site
0.7 mi
Confidence
Low

View full ZIP evidence →

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Denver

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.