Because Nitrate is associated with health effects at sustained elevated exposures, residents in Pacoima, California may find it useful that local water systems have returned detectable concentrations — facts that bear on long-term household water decisions.

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

Nitrate in Pacoima Tap Water

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

This analysis covers 98,820 residents across 3 ZIP codes in Pacoima.

Pacoima's overall water quality grade is C (56/100).

Is Nitrate in Pacoima Water Safe?

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

Average nitrate level across Pacoima: 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 Pacoima 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.

Related

• Nitrate — National Overview
• California Water Quality
• Pacoima Water Quality
• Check Your ZIP Code