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Quick answer: No. Drano Max Gel Clog Remover is a caustic, lye-based drain cleaner, not an enzyme cleaner. EWG's Guide to Healthy Cleaning grades it F for sodium hydroxide (lye) and synthetic fragrance. Liquid-Plumr Clog Destroyer Plus works the same way and grades D for similar reasons. If you want an actual enzyme-based drain cleaner, four verified-in-stock picks are below, starting at $24.99, including one with a formal EWG Guide Grade B.
EWG's Guide to Healthy Cleaning grades Drano Max Gel Clog Remover an F and Liquid-Plumr Clog Destroyer Plus a D: two of the most common drain cleaners under American kitchen sinks, and two of the more concerning products in EWG's cleaning database. The primary concerns EWG cites: sodium hydroxide (lye), a caustic alkali flagged for skin, eye, and respiratory hazard; synthetic fragrance (a term covering hundreds of undisclosed chemicals EWG identifies as potential sensitizers and suspected hormone disruptors); and in Liquid-Plumr's case, ethylene glycol.
There's a practical alternative: enzyme and bacteria-based products that break down organic buildup biologically rather than dissolving it with caustic chemistry. One honest caveat before the picks: enzyme-based drain cleaners are maintenance and prevention tools, not emergency clog clearers. They digest hair, grease, and soap buildup over time but won't clear a fully blocked drain in 15 minutes the way Drano markets itself. For a hard active clog, a drain snake is the right tool. For monthly maintenance pours and keeping slow drains flowing, enzyme products do the job.
This article covers what EWG rates on Drano and Liquid-Plumr, four enzyme-based picks verified in stock on Amazon, and practical notes on making the switch. See our Swap Oven Cleaner for EWG-Rated Alternatives: Non-Toxic Picks for Your Kitchen.
What EWG's Guide to Healthy Cleaning Rates on Drano and Liquid-Plumr
EWG's Guide to Healthy Cleaning (ewg.org/cleaners) rates household cleaning products A through F based on ingredient hazard data and disclosure transparency. For the two most common conventional drain cleaners, EWG flags the following:
| Product | EWG Grade | Key EWG-Flagged Concerns |
|---|---|---|
| Drano Max Gel Clog Remover | F | Sodium hydroxide (lye), corrosive alkali; synthetic fragrance: HIGH HAZARD per EWG's database |
| Liquid-Plumr Clog Destroyer Plus | D | Sodium hydroxide, synthetic fragrance, ethylene glycol: HIGH CONCERN per EWG's database |
EWG grades individual product variants, not brands as a whole. To look up your specific drain cleaner, search at ewg.org/cleaners by exact product name. These grades are EWG's published assessments of ingredient hazard, not safety certifications, and not our own claims.
4 Non-Toxic Drain Cleaner Picks: One EWG-Graded, Three That Avoid the Flagged Chemistry
All four picks were verified in stock on Amazon on 2026-09-14. Drainbo is the only pick here with a formal EWG Guide to Healthy Cleaning letter grade (Grade B). The other three are enzyme-based products not in EWG's Guide database; they're included because they avoid the sodium hydroxide, synthetic fragrance, and caustic chemistry that drives Drano's F and Liquid-Plumr's D. We don't claim an EWG grade for those three, only the ingredient approach they use. EWG grades are not safety certifications; we make no health claims of our own.
1. Drainbo Natural Drain Cleaner, 64 oz: EWG Guide Grade B
Price: $25.91 | Size: 64 oz | EWG Status: EWG Guide to Healthy Cleaning: Grade B (top-rated by EWG among drain cleaners with verified in-stock availability)
Drainbo is the only pick in this roundup with a formal EWG Guide to Healthy Cleaning grade, and at Grade B, it earns a meaningful step up from Drano's F and Liquid-Plumr's D. The formula relies on natural bacteria cultures and enzymes rather than caustic chemistry. No lye; no hydrochloric acid; no synthetic fragrance. At $25.91 for 64 oz, you get roughly 8 to 10 maintenance treatments per bottle depending on drain size and pour volume.
Stock note: Only 12 units were in stock at time of research (2026-09-14). If the 64 oz shows as unavailable, the Drainbo Professional 1-gallon variant was in stock at $32.00 as a backup from the same brand and formula.
Drainbo Natural Drain Cleaner, 64 oz on Amazon →
2. Green Gobbler Enzyme Drain Cleaner, 1 Gallon: No Lye, No Caustic Acids
Price: $25.97 | Size: 1 gallon (128 oz) | EWG Status: Not in EWG Guide database: enzyme-based, avoids lye and corrosive acids per product labeling
Green Gobbler's 1-gallon enzyme formula is marketed as an alternative to caustic chemicals: no lye, no bleach, no corrosive acids. The formula uses enzymes to digest grease, hair, soap, and food buildup in drains, and it covers septic systems and grease traps as well as household drains. At 128 oz, this is the highest volume in the roundup, which works out well for households treating multiple drains. EWG's Guide has not rated this product, so we cannot cite a letter grade; we include it because its ingredient approach avoids the chemistry EWG flags in Drano and Liquid-Plumr.
Green Gobbler Enzyme Drain Cleaner, 1 Gallon on Amazon →
3. Bio-Clean Drain Septic Bacteria, 2 lb Can: Long-Term Maintenance Formula
Price: $49.95 | Size: 2 lb dry concentrate | EWG Status: Not in EWG Guide database: natural bacteria and enzyme blend, no caustic chemicals per product claims
Bio-Clean is a dry bacteria and enzyme concentrate used by plumbers and homeowners for ongoing drain maintenance. The product claims no caustic chemicals; it works by introducing live bacteria cultures that digest organic matter in the drain system. One 2 lb can is designed to treat a household drain system for up to a year with regular monthly dosing. At $49.95, that works out to roughly $4 per treatment. Bio-Clean is the most focused of the picks on long-term prevention: it's not an on-demand product but a slow, regular treatment for keeping drain systems clear over time. EWG has not rated this product; we include it because it avoids lye and synthetic fragrance.
Bio-Clean Drain Septic Bacteria, 2 lb Can on Amazon →
4. Natural Elements Enzyme Drain Cleaner, 1 Gallon: Best Availability
Price: $24.99 | Size: 1 gallon (128 oz) | EWG Status: Not in EWG Guide database: enzyme-based, no lye or caustic acids per product claims
Natural Elements' 1-gallon enzyme drain cleaner was the best-stocked pick at time of research: 999 units available, giving it the most reliable availability of the four. The formula covers drains, septic tanks, grease traps, and pipes. No lye; no caustic acids. At $24.99, it's the lowest-priced 1-gallon option in the roundup. EWG's Guide has not assigned a letter grade to this product; we include it because its ingredient approach avoids the chemistry EWG flags in conventional drain cleaners.
Natural Elements Enzyme Drain Cleaner, 1 Gallon on Amazon →
Quick Swap Summary
| Product | EWG Grade | Price | Size | Amazon |
|---|---|---|---|---|
| Drano Max Gel | F swap out | ~$9–12 | 32–80 oz | , |
| Liquid-Plumr Clog Destroyer Plus | D swap out | ~$8–11 | 32–80 oz | , |
| Drainbo Natural, 64 oz | B ✓ | $25.91 | 64 oz | Buy → |
| Green Gobbler Enzyme, 1 Gallon | Not rated: avoids flagged chemistry | $25.97 | 1 gallon | Buy → |
| Bio-Clean Bacteria, 2 lb | Not rated: avoids flagged chemistry | $49.95 | 2 lb can | Buy → |
| Natural Elements Enzyme, 1 Gallon | Not rated: avoids flagged chemistry | $24.99 | 1 gallon | Buy → |
Making the Switch: Practical Notes
A few practical considerations for the transition away from Drano or Liquid-Plumr:
- Dispose of lye-based products responsibly. Sodium hydroxide (lye) is classified as household hazardous waste in many municipalities. Don't pour Drano down the drain in bulk to "use it up." Check your local household hazardous waste (HHW) program for drop-off options. Using up the remainder of a bottle as directed is fine; bulk disposal is the concern.
- Start with a monthly maintenance pour. Enzyme products work best as prevention, not rescue. Begin with a monthly overnight treatment: pour after the household is done using that drain for the night, and let the bacteria work for 6 to 8 hours before the drain sees water again.
- Keep a drain snake for true clogs. Enzyme cleaners are not designed to clear a fully blocked pipe in minutes. A basic manual drain snake ($10 to $15) clears hair clogs quickly and is the right first move for a hard clog regardless of which cleaner you're using.
- Cost comparison: Green Gobbler and Natural Elements come in at $25 to $26 per gallon, providing 8 to 12 maintenance treatments per bottle depending on pour size. Drano Max Gel runs roughly $9 to $12 per bottle, but a single hard clog often uses most of a bottle. Enzyme products used for ongoing monthly maintenance spread cost across more uses.
- Septic systems: All four enzyme picks are marketed as septic-safe. Lye-based products like Drano can disrupt the bacterial culture in septic tanks. Those bacteria are essential for waste breakdown. If you're on a septic system, that's an additional practical reason to consider the switch.
For a broader look at lower-hazard cleaning products across categories, see our guide to EWG-rated all-purpose cleaners and our full guide to non-toxic cleaning products by EWG.
Frequently Asked Questions
Do enzyme drain cleaners actually unclog drains?
Enzyme and bacteria-based drain cleaners digest organic buildup (hair, grease, soap residue) through biological activity over time. For slow drains with gradual buildup, they're effective as a maintenance treatment applied regularly. They're not designed to clear a fully blocked drain on a fast timeline the way caustic products like Drano operate. For a hard active clog, a drain snake is the practical first step.
Are enzyme drain cleaners safe for septic systems?
All four products in this roundup are marketed as safe for septic systems. Lye-based drain cleaners like Drano can harm the bacterial culture in septic tanks, which are essential for breaking down household waste. Enzyme and bacteria-based products work with similar biological processes rather than disrupting them. If you're on a septic system, this is one practical reason to consider making the switch.
What does EWG say about Drano?
EWG's Guide to Healthy Cleaning grades Drano Max Gel Clog Remover an F (EWG's highest concern rating), primarily for sodium hydroxide (lye), a corrosive alkali EWG flags for skin, eye, and respiratory hazard concerns, and synthetic fragrance. These are EWG's published assessments of ingredient hazard from their database; they are not safety certifications, and not our own claims. To see the current grade and specific ingredient breakdowns, search "Drano" at ewg.org/cleaners.
How often should I use an enzyme drain cleaner?
For ongoing maintenance, most manufacturers recommend a monthly treatment poured at night when drains won't be used for 6 to 8 hours. Heavy-use drains benefit from more frequent treatment. Bio-Clean recommends daily use for the first week during initial treatment, then dropping to weekly and eventually monthly as the drain system is conditioned.
Can I use enzyme drain cleaner after pouring Drano?
Wait until the caustic product has fully flushed from the pipes before applying an enzyme cleaner, typically a full day of normal water use through the drain. Lye (sodium hydroxide) is highly alkaline and will deactivate enzyme cultures if introduced immediately after a caustic treatment. Flush the drain thoroughly with hot water, then wait at least 24 hours before using an enzyme product.
