Exceeds EPA Limit Nitrate EXCEEDS EPA LIMIT

Nitrate in North Hills, CA Drinking Water

Nitrate data for North Hills, California · 61,607 residents · 2 ZIP codes

Across the water systems that serve North Hills, 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.

45 ppb
Max Level Detected
45 ppb
Average Level
10 mg/L (as nitrogen)
EPA MCL
High
Health Risk
Reverse Osmosis or Ion Exchange
Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-04-05

Nitrate in North Hills Tap Water

Nitrate has been detected in North Hills, California drinking water at a maximum level of 45 ppb — below the EPA MCL of 10 mg/L (as nitrogen).

This analysis covers 61,607 residents across 2 ZIP codes in North Hills.

North Hills's overall water quality grade is C (58/100).

Is Nitrate in North Hills Water Safe?

Nitrate levels in parts of North Hills exceed the EPA MCL of 10 mg/L (as nitrogen). The EPA requires water systems to take corrective action when this limit is exceeded.

If you live in an affected ZIP code, consider installing a reverse osmosis or ion exchange filter certified under NSF 53 / NSF 58 and testing your water independently.

Nitrate Levels by ZIP Code

ZIP Code Nitrate Level EPA Limit Status
91343 45 ppm 10 mg/L (as nitrogen) OK
91393 45 ppm 10 mg/L (as nitrogen) OK

Average nitrate level across North Hills: 45 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 North Hills Water

  1. Reverse osmosis is the most effective method for nitrate removal
  2. Ion exchange systems designed for nitrate can also work
  3. Standard carbon filters do NOT remove nitrate
  4. Boiling water increases nitrate concentration — never boil for nitrate

Look for filters certified under NSF 53 / NSF 58 for nitrate removal.

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