C49/100
Des Peres Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 87,971 residents · Missouri
What's In Des Peres's Tap Water?
51
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
CS LOS CERROS WATER COMPANY INC
Population Served
2,613
Water Source
Groundwater
System ID
AZ0410128
CS HARRISBURG UTILITY COMPANY
Population Served
1,759
Water Source
Groundwater
System ID
AZ0415029
CS Q MOUNTAIN WATER COMPANY
Population Served
1,224
Water Source
Groundwater
System ID
AZ0415096
LITTLE LAKE WEIR SUBDIVISION
Population Served
1,138
Water Source
Groundwater
System ID
FL3420761
SUN RAY ESTATES
Population Served
1,460
Water Source
Groundwater
System ID
FL3421314
OCALA HEIGHTS S/D
Population Served
1,045
Water Source
Groundwater
System ID
FL3424651
TYMBER CREEK UTILITIES
Population Served
1,007
Water Source
Purchased Groundwater
System ID
FL3641401
MAGNOLIA-GREEN ACRES SUBDIVISION
Population Served
1,575
Water Source
Groundwater
System ID
LA1011004
MAGNOLIA-LE TRIOMPHE SUBDIVISION
Population Served
1,278
Water Source
Purchased Groundwater
System ID
LA1055162
MAGNOLIA-EDEN ISLES
Population Served
10,155
Water Source
Groundwater
System ID
LA1103013
MAGNOLIA-RESOLVE WHISPERWOOD
Population Served
6,867
Water Source
Groundwater
System ID
LA1103046
MAGNOLIA-THE MEADOWS
Population Served
4,701
Water Source
Groundwater
System ID
LA1103106
MAGNOLIA-GREENLEAVES
Population Served
8,031
Water Source
Groundwater
System ID
LA1103118
MAGNOLIA-MONTEREY SUBDIVISION
Population Served
1,356
Water Source
Groundwater
System ID
LA1103148
MAGNOLIA-LAKESHORE ESTATES
Population Served
4,146
Water Source
Groundwater
System ID
LA1103171
MAGNOLIA-PENN MILL LAKES
Population Served
1,152
Water Source
Groundwater
System ID
LA1103185
MAGNOLIA-GUSTE ISLAND
Population Served
2,847
Water Source
Groundwater
System ID
LA1103189
TERRE DU LAC
Population Served
3,200
Water Source
Groundwater
System ID
MO4036059
LAKE SHERWOOD SUBD
Population Served
1,100
Water Source
Groundwater
System ID
MO6036039
INDIAN HILLS UTILITIES OPERATING COMPANY
Population Served
1,600
Water Source
Groundwater
System ID
MO6036052
ROBINWOOD FOREST UTILITY INC
Population Served
1,275
Water Source
Groundwater
System ID
MS0240212
WOOLMARKET VILLAGE ESTATES
Population Served
2,910
Water Source
Groundwater
System ID
MS0240237
GULF PARK
Population Served
4,813
Water Source
Groundwater
System ID
MS0300044
OCEAN BEACH
Population Served
1,407
Water Source
Groundwater
System ID
MS0300113
WELLSGATE
Population Served
1,447
Water Source
Groundwater
System ID
MS0360068
CANEBRAKE UTILITY ASSOC INC
Population Served
2,619
Water Source
Groundwater
System ID
MS0370016
LAKE ROYALE S/D
Population Served
5,890
Water Source
Purchased Surface Water
System ID
NC0235108
FOXWOOD HILLS (SC3750025)
Population Served
1,703
Water Source
Purchased Surface Water
System ID
SC3750025
COPANO COVE SUBDIVISION
Population Served
1,668
Water Source
Purchased Surface Water
System ID
TX0040003
ARANSAS BAY UTILITIES
Population Served
1,062
Water Source
Groundwater
System ID
TX0040018
VACATION VILLAGE
Population Served
1,140
Water Source
Groundwater
System ID
TX0610052
FOUNTAINVIEW SUBDIVISION
Population Served
2,703
Water Source
Groundwater
System ID
TX1010127
LAKE LIMESTONE COVES WATER SYSTEM
Population Served
1,080
Water Source
Groundwater
System ID
TX1980020
Frequently Asked Questions About Des Peres Water
Is Des Peres tap water safe to drink?
Des Peres, Missouri tap water receives a grade of C (49/100), which is considered fair. 3 contaminant(s) exceed EPA maximum contaminant levels and 2022 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Des Peres's water?
Of the 70 contaminants tested in Des Peres's water supply, the most notable include Copper (90th percentile), PFOS, PFOA, Lead (90th percentile). 3 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Des Peres have any water quality violations?
Yes, Des Peres has 2022 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, TT. 162 of these are health-based violations, which are the most serious category.
Do I need a water filter in Des Peres?
Based on EPA data, using a water filter in Des Peres is recommended. 3 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Des Peres's tap water come from?
Des Peres's drinking water is sourced from groundwater and supplied by CS LOS CERROS WATER COMPANY INC and 32 other water system(s). The system serves approximately 87,971 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Des Peres's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Des Peres's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Des Peres's water compare to other cities in Missouri?
Des Peres's water quality score of 49/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Missouri state page to see how all cities in the state compare.
What should I do if I'm concerned about Des Peres's water quality?
If you have concerns about Des Peres's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (CS LOS CERROS WATER COMPANY INC) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.