# 35 Ill. Adm. Code 391.403: Section 391.403 Application Buffer Area

> Illinois · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_403

## Section

- **Citation:** 35 Ill. Adm. Code 391.403
- **Heading:** Section 391.403 Application Buffer Area
- **Jurisdiction:** Illinois
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Illinois Administrative Code / Title 35 ENVIRONMENTAL PROTECTION / CHAPTER II: ENVIRONMENTAL PROTECTION AGENCY / Part 391 DESIGN CRITERIA FOR SLUDGE APPLICATION ON LAND / Section 391.403 Application Buffer Area

## Text

Section 391
Section 391.403  Application
Buffer Area
a)         Sludge application with immediate incorporation or injection
shall not be done closer than 20 feet from any occupied dwelling or 10 feet
from the closest edge of traveled portions of a public road or outside roadway
fence lines.
b)         Sludge application with no immediate incorporation shall not
be done closer than 200 feet from any occupied dwelling or 20 feet from the
closet edge of traveled portions of a primary and secondary public roads or 10
feet from the closest edge of lesser utilized public roads or outside roadway
fence lines.
c)         Sludge application by ridge and furrow shall not be done
closer than 200 feet from any occupied dwelling or the closest edge of traveled
portions of a public road or outside roadway fence lines.
d)         Sludge shall not be applied on land which lies within 150 feet
from wells used to supply potable water or other potable water supplies and 200
feet from surface waters or intermittent streams; or within one-fourth of a
mile of any potable water supply wells located in consolidated bedrock such as
limestone or sinkhole areas unless a 50 foot depth of non-sandy or non-gravelly
unconsolidated material exists.
e)         Sludge shall not be applied or discharged to streams,
waterways which are grassed or otherwise, or those flood plains having a return
frequency more often than a 10 year frequency.
f)         Sludge application by low pressure spray irrigation systems
(less than 50 psi) shall not be done closer than 200 feet from any occupied
dwelling, closest edge of traveled portion of public road, surface waters,
waterways or floodplains as measured from the outer boundary of the spray
pattern. The wind velocity shall be less than 15 mph during spray irrigation
periods
ear frequency.
f)         Sludge application by low pressure spray irrigation systems
(less than 50 psi) shall not be done closer than 200 feet from any occupied
dwelling, closest edge of traveled portion of public road, surface waters,
waterways or floodplains as measured from the outer boundary of the spray
pattern. The wind velocity shall be less than 15 mph during spray irrigation
periods.
g)         Sludge application by high pressure spray irrigation systems (>50
psi) shall not be done closer than 1000 feet from any occupied dwelling,
closest edge of traveled portion of public road, surface waters, waterways or
floodplains as measured from the outer boundary of the spray pattern.  The wind
velocity shall be less than 15 mph during spray irrigation periods.

## Nearby sections

- [35 Ill. Adm. Code 391.401 Section 391.401  Introduction](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_401.md)
- [35 Ill. Adm. Code 391.402 Section 391.402  General Criteria](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_402.md)
- [35 Ill. Adm. Code 391.403 Section 391.403  Application Buffer Area](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_403.md)
- [35 Ill. Adm. Code 391.404 Section 391.404  Site Characteristics](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_404.md)
- [35 Ill. Adm. Code 391.405 Section 391.405  Water Treatment Plant Sludge](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_405.md)
- [35 Ill. Adm. Code 391.410 Section 391.410  Nutrient Loading](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_410.md)
- [35 Ill. Adm. Code 391.412 Section 391.412  Phosphorus](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_412.md)
- [35 Ill. Adm. Code 391.413 Section 391.413  Potassium](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_413.md)
- [35 Ill. Adm. Code 391.420 Section 391.420  Heavy Metal Loading](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_420.md)
- [35 Ill. Adm. Code 391.430 Section 391.430  Site Monitoring](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_430.md)
- [35 Ill. Adm. Code 391.440 Section 391.440  Additional Precautions](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_440.md)
- [35 Ill. Adm. Code 391.450 Section 391.450  Land Reclamation Projects](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_450.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P391_S391_403. Check the current official text before relying on it. Not legal advice.