Des Peres, Missouri Water Quality Report
Water quality data for 286 water systems serving 165,571 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 210.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 2100% | Above guideline |
| PFBS | 0.006 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.004 | 0.010 ug/L | 0.001 ug/L(EWG) | 43% | Within limit |
| PFOA | 0.006 | 0.004 ug/L | 0.090 ug/L(EWG) | 155% | Above limit |
| PFOS | 0.006 | 0.004 ug/L | 0.300 ug/L(EWG) | 160% | Above limit |
| PFPeA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (69)
66
Sep 29, 2025
35
Sep 1, 2025
75
Aug 31, 2025
75
Aug 31, 2025
45
Aug 9, 2025
45
Aug 9, 2025
75
Jul 31, 2025
75
Jul 31, 2025
75
Jul 24, 2025
72
Jul 1, 2025
52
Jul 1, 2025
52
Jul 1, 2025
72
Jul 1, 2025
71
Jul 1, 2025
72
Jul 1, 2025
27
Jul 1, 2025 — Jun 30, 2026
27
Jul 1, 2025 — Jun 30, 2026
71
Jul 1, 2025
27
Jul 1, 2025 — Jun 30, 2026
71
Jul 1, 2025
27
Jul 1, 2025 — Jun 30, 2026
71
Jul 1, 2025
72
Jul 1, 2025
71
Jul 1, 2025
34
Jul 1, 2025
34
Jul 1, 2025
72
Jul 1, 2025
72
Jul 1, 2025
71
Jul 1, 2025
72
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
34
May 15, 2025
34
May 15, 2025
45
Feb 11, 2025
45
Feb 11, 2025
45
Feb 11, 2025
66
Jan 1, 2025
52
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
75
Dec 7, 2024
75
Dec 7, 2024
75
Dec 7, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
66
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
66
Oct 1, 2024
66
Oct 1, 2024
75
Sep 1, 2024
58
Aug 10, 2024
58
Aug 10, 2024
58
Aug 10, 2024
Resolved Violations (931)
75
Sep 4, 2025
75
Sep 4, 2025
75
Sep 4, 2025
3A
Sep 1, 2025 — Sep 30, 2025
19
Sep 1, 2025 — Sep 30, 2025
+ 926 more resolved violations
Frequently Asked Questions
Is Des Peres tap water safe to drink?
Des Peres's water has 2 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Des Peres tap water?
7 contaminants have been detected in Des Peres's water supply across 286 water systems. See the full contaminant table above for details.
How can I improve my water quality in Des Peres?
Install a water filter rated for the specific contaminants found in Des Peres's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Des Peres have any water quality violations?
Yes, Des Peres currently has 2787 active violations. See the violations section above for details.