Water Quality in Boulder, CO (80301)

EPA violation data for public water systems serving ZIP code 80301.

Based on EPA compliance data. Not a substitute for an official water quality report from your utility.

25,007

Population

28

Water Systems

263

Violations (5yr)

4

Health-Based

Location

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Water Systems Serving This Area (28)

Boulder City Of

All resolved
Surface water 166,080 people served
2 violations (5yr) · All resolved
Lead tested: 2 ppb (limit: 15 ppb) ✓

Longmont City Of

All resolved
Surface water 102,866 people served
2 violations (5yr) · All resolved
Lead tested: 1.6 ppb (limit: 15 ppb) ✓

Erie Town Of

Surface water 40,061 people served
0 violations
Lead tested: 2.6 ppb (limit: 15 ppb) ✓

Lafayette City Of

All resolved
Surface water 28,700 people served
4 violations (5yr) · All resolved
Lead tested: 2 ppb (limit: 15 ppb) ✓

Boulder Valley Wtr & San Dist

Purchased surface water 6,500 people served
0 violations

Mile Hi Water Inc Hauler

2 health-based
Purchased surface water 1,000 people served
10 violations (5yr) · 2 health-based

Countryside Village

Purchased surface water 855 people served
0 violations

Fairview Conoco

Groundwater 700 people served
0 violations

Jacobs Corner

All resolved
Groundwater under influence of surface water 250 people served
5 violations (5yr) · All resolved
Lead tested: 0.5 ppb (limit: 15 ppb) ✓

Lake Pump System

2 health-based
Surface water 161 people served
227 violations (5yr) · 2 health-based · All resolved

Pine Lake Village

Purchased surface water 65 people served
1 violation (5yr)
Lead tested: 0 ppb (limit: 15 ppb) ✓

Peaceful Meadow Retreat

Groundwater 51 people served
6 violations (5yr)

Fountain Tree Water Assn

Groundwater 50 people served
0 violations

Friends School

All resolved
Groundwater 39 people served
2 violations (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓

Gold Hill Elem School

Purchased surface water 35 people served
0 violations

Rosebud Lake

All resolved
Groundwater 34 people served
4 violations (5yr) · All resolved

Westland 1

Groundwater under influence of surface water 34 people served
0 violations

Pure Water Prod-14786 Memorial

Purchased groundwater 25 people served
0 violations

A.R.F. Products, Inc.

Groundwater 4 people served
0 violations

Uncle Bobs Bbq Pit

Groundwater 0
0 violations

Douglass Elementary Dale Hobbs

Groundwater 0
0 violations

Boulder Frst Chrch Of Nazarene

Groundwater 0
0 violations

Indian Peaks Springwater

Purchased groundwater 0
0 violations

Koa Boulder Campground

Groundwater 0
0 violations

Columbine News District Inc

Purchased surface water 0
0 violations

Green Acres Preschool

Purchased surface water 0
0 violations

Calvary Bible E Free Church

Purchased surface water 0
0 violations

Jamestown Elem School

Groundwater 0
0 violations

Contaminants Found

Surface Water Treatment RuleHealth-Based
12 violations
All resolved
Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-Based
3 violations
All resolved
Revised Total Coliform RuleMonitoring

Missed testing deadlines — not a detection of bacteria.

19 violations
Has active
Public NoticeMonitoring
19 violations
Has active
Total Haloacetic Acids (HAA5)Monitoring
4 violations
All resolved
TTHMMonitoring
4 violations
All resolved
ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

4 violations
All resolved
NitrateMonitoring

At high levels, nitrate can cause blue baby syndrome in infants.

4 violations
All resolved
Interim Enhanced Surface Water Treatment RuleMonitoring
3 violations
All resolved
Consumer Confidence RuleMonitoring

Annual water quality report delivery requirement.

3 violations
Has active
Lead and Copper RuleMonitoring

Lead and copper testing requirement. Lead exposure can cause developmental harm in children.

3 violations
Has active
HeptachlorMonitoring
3 violations
All resolved
DiquatMonitoring
3 violations
All resolved
OXAMYLMonitoring
3 violations
All resolved
NickelMonitoring
3 violations
All resolved
AtrazineMonitoring
3 violations
All resolved
SeleniumMonitoring
3 violations
All resolved
MercuryMonitoring
3 violations
All resolved
Vinyl chlorideMonitoring
3 violations
All resolved
cis-1,2-DichloroethyleneMonitoring
3 violations
All resolved
BenzeneMonitoring
3 violations
All resolved
EndothallMonitoring
3 violations
All resolved
LASSOMonitoring
3 violations
All resolved
Carbon tetrachlorideMonitoring
3 violations
All resolved
Antimony, TotalMonitoring
3 violations
All resolved
1,2-DichloropropaneMonitoring
3 violations
All resolved
p-DichlorobenzeneMonitoring
3 violations
All resolved
1,2-DIBROMO-3-CHLOROPROPANEMonitoring
3 violations
All resolved
Total Polychlorinated Biphenyls (PCB)Monitoring
3 violations
All resolved
BHC-GAMMAMonitoring
3 violations
All resolved
o-DichlorobenzeneMonitoring
3 violations
All resolved
ChromiumMonitoring
3 violations
All resolved
1,1,2-TrichloroethaneMonitoring
3 violations
All resolved
CHLOROBENZENEMonitoring
3 violations
All resolved
HEXACHLOROBENZENEMonitoring
3 violations
All resolved
ETHYLENE DIBROMIDEMonitoring
3 violations
All resolved
trans-1,2-DichloroethyleneMonitoring
3 violations
All resolved
ChlordaneMonitoring
3 violations
All resolved
SimazineMonitoring
3 violations
All resolved
1,1-DichloroethyleneMonitoring
3 violations
All resolved
DalaponMonitoring
3 violations
All resolved
2,4-DMonitoring
3 violations
All resolved
Benzo(a)pyreneMonitoring
3 violations
All resolved
1,2,4-TrichlorobenzeneMonitoring
3 violations
All resolved
BariumMonitoring
3 violations
All resolved
DinosebMonitoring
3 violations
All resolved
Beryllium, TotalMonitoring
3 violations
All resolved
ToxapheneMonitoring
3 violations
All resolved
DICHLOROMETHANEMonitoring
3 violations
All resolved
FluorideMonitoring
3 violations
All resolved
TolueneMonitoring
3 violations
All resolved
2,4,5-TPMonitoring
3 violations
All resolved
Di(2-ethylhexyl) adipateMonitoring
3 violations
All resolved
Di(2-ethylhexyl) phthalateMonitoring
3 violations
All resolved
Xylenes, TotalMonitoring
3 violations
All resolved
EndrinMonitoring
3 violations
All resolved
CarbofuranMonitoring
3 violations
All resolved
TetrachloroethyleneMonitoring
3 violations
All resolved
PentachlorophenolMonitoring
3 violations
All resolved
1,1,1-TrichloroethaneMonitoring
3 violations
All resolved
1,2-DichloroethaneMonitoring
3 violations
All resolved
Heptachlor epoxideMonitoring
3 violations
All resolved
MethoxychlorMonitoring
3 violations
All resolved
HexachlorocyclopentadieneMonitoring
3 violations
All resolved
StyreneMonitoring
3 violations
All resolved
ArsenicMonitoring

A naturally occurring element that can cause cancer and other health effects at high levels.

3 violations
All resolved
CadmiumMonitoring
3 violations
All resolved
EthylbenzeneMonitoring
3 violations
All resolved
Thallium, TotalMonitoring
3 violations
All resolved
PicloramMonitoring
3 violations
All resolved
TrichloroethyleneMonitoring
3 violations
All resolved
Aldicarb sulfoneMonitoring
1 violation
All resolved
AldicarbMonitoring
1 violation
All resolved
Aldicarb sulfoxideMonitoring
1 violation
All resolved
Stage 2 Disinfectants and Disinfection Byproducts RuleMonitoring

Monitoring for chemicals formed during water treatment disinfection.

1 violation
All resolved
NitriteMonitoring

Similar to nitrate — harmful to infants at high levels.

1 violation
All resolved

Lead & Copper Levels

Lead (Pb)

Within limit
0 ppb measured Action level: 15 ppb

Sampled: Jul 2025

How Does This Compare?

Boulder (80301) has more violations than 99% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 263.

Fewer violations 99th percentile More violations

Recommended Water Filters

Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.

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