Nitrate in La Quinta, CA Drinking Water
Nitrate data for La Quinta, California · 354,757 residents · 3 ZIP codes
Across the water systems that serve La Quinta, California, Nitrate has appeared in EPA compliance samples — standard municipal treatment targets this contaminant, though detections in the compliance record indicate it has reached household taps at measurable levels.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Nitrate in La Quinta Tap Water
Nitrate has been detected in La Quinta, California drinking water at a maximum level of 9.4 ppb — below the EPA MCL of 10 mg/L (as nitrogen).
This analysis covers 354,757 residents across 3 ZIP codes in La Quinta.
La Quinta's overall water quality grade is C (55/100).
Is Nitrate in La Quinta Water Safe?
Nitrate was detected in La Quinta water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or ion exchange filter can reduce nitrate levels further.
Nitrate Levels by ZIP Code
| ZIP Code | Nitrate Level | EPA Limit | Status |
|---|---|---|---|
| 92247 | 9.4 ppm | 10 mg/L (as nitrogen) | OK |
| 92248 | 9.4 ppm | 10 mg/L (as nitrogen) | OK |
| 92253 | 9 mg/L | 10 mg/L (as nitrogen) | OK |
Average nitrate level across La Quinta: 9.27 ppb
Health Effects of Nitrate
- Methemoglobinemia ("blue baby syndrome") in infants under 6 months
- Increased risk of colorectal and bladder cancer (long-term)
- Thyroid disease from chronic exposure
- Possible reproductive effects
Health risk severity: High. Governed by the National Primary Drinking Water Regulations.
How Nitrate Gets Into Drinking Water
- Agricultural fertilizer runoff
- Animal feedlot operations and manure
- Septic system leachate
- Urban stormwater and wastewater discharge
What to Do About Nitrate in La Quinta Water
- Reverse osmosis is the most effective method for nitrate removal
- Ion exchange systems designed for nitrate can also work
- Standard carbon filters do NOT remove nitrate
- Boiling water increases nitrate concentration — never boil for nitrate
Look for filters certified under NSF 53 / NSF 58 for nitrate removal.