Environmental Protection Agency (EPA)
18,133,348Words in 406 parts
10.3Restriction density (per 1,000 words)
17.7Reading grade
65.9%Unchanged since 2017
71Flagged parts
2026-11-03Last change
Section changes per year
From the eCFR versioner, for the parts that the agency owns now. Before 2017 is the baseline load.
Text and size
- Sentences
- 30.7 words on average; 23.1% over 40 words; 27.5% passive; 17.0 cross-references per 1,000 words
- Sentence types
- definition 4.9% · prohibition 1.6% · paperwork 7.5% · obligation 19.8% · permission 7.2% · other 59.1%
- Checksum
57898f43def26f95a338d53d5aae2d5209524eec03ab81f4bfea0406eaf580c4changed since last refresh
Review candidates in this agency
| Rank | Part | Words | Score |
|---|---|---|---|
| 37 | 40 CFR 433
METAL FINISHING POINT SOURCE CATEGORY
High signals: Reading grade
+3.4 SD · Paperwork share
+2.4 SD · Directive share
+2.2 SD |
2,693 | 1.45 |
| 46 | 40 CFR 408
CANNED AND PRESERVED SEAFOOD PROCESSING POINT SOURCE CATEGORY
High signals: Paperwork share
+3.3 SD · Directive share
+1.3 SD · Size
+1.2 SD · Reading grade
+1.1 SD |
24,400 | 1.38 |
| 52 | 40 CFR 265
INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
High signals: Size
+2.7 SD · Directive share
+1.9 SD · Reading grade
+1.1 SD |
132,108 | 1.32 |
| 54 | 40 CFR 418
FERTILIZER MANUFACTURING POINT SOURCE CATEGORY
High signals: Reading grade
+2.6 SD · Paperwork share
+2.1 SD · Directive share
+1.5 SD |
7,472 | 1.31 |
| 72 | 40 CFR 264
STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES
High signals: Size
+2.9 SD · Directive share
+1.6 SD · Reading grade
+1.0 SD |
170,893 | 1.23 |
| 77 | 40 CFR 75
CONTINUOUS EMISSION MONITORING
High signals: Size
+3.0 SD · Reading grade
+1.8 SD |
185,118 | 1.22 |
| 79 | 40 CFR 413
ELECTROPLATING POINT SOURCE CATEGORY
High signals: Reading grade
+2.3 SD · Directive share
+1.5 SD · Paperwork share
+1.3 SD |
7,818 | 1.20 |
| 80 | 40 CFR 424
FERROALLOY MANUFACTURING POINT SOURCE CATEGORY
High signals: Paperwork share
+3.6 SD · Reading grade
+1.9 SD |
4,714 | 1.20 |
| 84 | 40 CFR 69
SPECIAL EXEMPTIONS FROM REQUIREMENTS OF THE CLEAN AIR ACT
High signals: Directive share
+2.0 SD · Restriction density
+1.9 SD · Paperwork share
+1.0 SD |
11,202 | 1.18 |
| 88 | 40 CFR 63
NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES
High signals: Size
+5.5 SD |
3,463,577 | 1.17 |
| 92 | 40 CFR 426
GLASS MANUFACTURING POINT SOURCE CATEGORY
High signals: Paperwork share
+2.8 SD · Directive share
+1.4 SD |
8,912 | 1.17 |
| 93 | 40 CFR 146
UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS
High signals: Directive share
+1.5 SD · Size
+1.5 SD · Paperwork share
+1.2 SD |
33,629 | 1.16 |
| 101 | 40 CFR 67
EPA APPROVAL OF STATE NONCOMPLIANCE PENALTY PROGRAM
High signals: Directive share
+2.6 SD · Restriction density
+2.0 SD · Paperwork share
+1.3 SD |
4,041 | 1.15 |
| 103 | 40 CFR 415
INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY
High signals: Paperwork share
+2.4 SD · Size
+1.3 SD · Directive share
+1.1 SD |
26,142 | 1.14 |
| 112 | 40 CFR 142
NATIONAL PRIMARY DRINKING WATER REGULATIONS IMPLEMENTATION
High signals: Size
+1.6 SD · Paperwork share
+1.5 SD · Directive share
+1.4 SD |
40,194 | 1.12 |
| 114 | 40 CFR 304
ARBITRATION PROCEDURES FOR SMALL SUPERFUND COST RECOVERY CLAIMS
High signals: Directive share
+2.0 SD · Restriction density
+1.4 SD · Paperwork share
+1.3 SD |
8,949 | 1.11 |
| 117 | 40 CFR 403
GENERAL PRETREATMENT REGULATIONS FOR EXISTING AND NEW SOURCES OF POLLUTION
High signals: Paperwork share
+1.6 SD · Size
+1.4 SD · Directive share
+1.2 SD |
30,955 | 1.10 |
| 148 | 40 CFR 169
BOOKS AND RECORDS OF PESTICIDE PRODUCTION AND DISTRIBUTION
High signals: Paperwork share
+3.8 SD · Directive share
+1.4 SD · Restriction density
+1.2 SD |
1,914 | 1.05 |
| 170 | 40 CFR 257
CRITERIA FOR CLASSIFICATION OF SOLID WASTE DISPOSAL FACILITIES AND PRACTICES
High signals: Size
+2.2 SD · Directive share
+1.4 SD · Paperwork share
+1.3 SD · Restriction density
+1.2 SD |
76,805 | 1.03 |
| 175 | 40 CFR 407
CANNED AND PRESERVED FRUITS AND VEGETABLES PROCESSING POINT SOURCE CATEGORY
High signals: Directive share
+2.3 SD · Paperwork share
+1.1 SD |
9,405 | 1.03 |
| 176 | 40 CFR 71
FEDERAL OPERATING PERMIT PROGRAMS
High signals: Size
+1.5 SD · Paperwork share
+1.4 SD · Directive share
+1.3 SD · Restriction density
+1.3 SD |
35,411 | 1.03 |
| 184 | 40 CFR 428
RUBBER MANUFACTURING POINT SOURCE CATEGORY
High signals: Reading grade
+2.2 SD · Paperwork share
+1.5 SD |
10,460 | 1.02 |
| 198 | 40 CFR 141
NATIONAL PRIMARY DRINKING WATER REGULATIONS
High signals: Size
+3.1 SD · Directive share
+1.4 SD |
217,720 | 1.00 |
| 205 | 40 CFR 258
CRITERIA FOR MUNICIPAL SOLID WASTE LANDFILLS
High signals: Directive share
+1.6 SD · Size
+1.5 SD · Reading grade
+1.0 SD |
34,535 | 0.98 |
| 219 | 40 CFR 121
STATE CERTIFICATION OF ACTIVITIES REQUIRING A FEDERAL LICENSE OR PERMIT
High signals: Paperwork share
+3.6 SD · Directive share
+1.7 SD · Reading grade
+1.1 SD |
4,386 | 0.96 |
Score: the mean of six signals, in standard deviations (SD). Across the CFR, the top 641 of 6,402 ranked parts (10%) get a flag for review; this list shows 25. A flag is not a finding.
Statutes behind the most text
- 42 U.S.C. 7401: 11,203,928 words in 50 parts (61.8% of this agency's text)
- 33 U.S.C. 1251: 1,381,055 words in 63 parts (7.6% of this agency's text)
- 15 U.S.C. 2604: 803,567 words in 5 parts (4.4% of this agency's text)
- 42 U.S.C. 6905: 708,821 words in 8 parts (3.9% of this agency's text)
- 42 U.S.C. 7410: 581,740 words in 4 parts (3.2% of this agency's text)
- 42 U.S.C. 300f: 564,778 words in 11 parts (3.1% of this agency's text)
- 33 U.S.C. 1311: 527,879 words in 34 parts (2.9% of this agency's text)
- 42 U.S.C. 7414: 519,147 words in 6 parts (2.9% of this agency's text)
- 42 U.S.C. 7521: 416,255 words in 1 parts (2.3% of this agency's text)
- 42 U.S.C. 9601: 362,208 words in 9 parts (2.0% of this agency's text)
From the authority notes. A citation is not proof that the statute requires the rule.
Largest parts
- 40 CFR 63: NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (3,463,577 words)
- 40 CFR 60: STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES (1,956,230 words)
- 40 CFR 52: APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (1,776,812 words)
- 40 CFR 721: SIGNIFICANT NEW USES OF CHEMICAL SUBSTANCES (740,665 words)
- 40 CFR 86: CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES (416,255 words)
- 40 CFR 98: MANDATORY GREENHOUSE GAS REPORTING (409,232 words)
- 40 CFR 97: FEDERAL NOX BUDGET TRADING PROGRAM, CAIR NOX AND SO2 TRADING PROGRAMS, CSAPR NOX AND SO2 TRADING PROGRAMS, AND TEXAS SO2 TRADING PROGRAM (371,761 words)
- 40 CFR 51: REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS (331,442 words)
- 40 CFR 81: DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES (308,452 words)
- 40 CFR 136: GUIDELINES ESTABLISHING TEST PROCEDURES FOR THE ANALYSIS OF POLLUTANTS (277,737 words)
Reading grade and sentence types are approximate. Simple rules label each sentence; the first match wins.